US4266946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasoline containing exhaust emission reducing additives
Assignee: Ethyl Corp
•
Filing: 1980-04-28
•
Granted: 1981-05-12
•
Expires: 2000-04-28
Abstract
Abstract Exhaust hydrocarbon emissions from an internal combustion engine being operated on gasoline containing a cyclopentadienyl manganese antiknock are reduced by the addition of an exhaust emission reducing amount of a polyester of a polymerized carboxylic acid to the gasoline.
Inventors
- 👤 Leonard M. Niebylski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:56
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/02; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19; C10L1/1905; C10L10/10; C10L1/30; C10L1/305
Claims Analysis
Total Claims: 99
Claim 1
Independent Claim
97 words
A lead-free or substantially lead-free hydrocarbon fuel composition for use in a spark ignited internal combustion engine which comprises a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a dimer acid, a trimer acid or a mixture of a dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and a lower alkyl aliphatic monohydric alcohol.
Claim 2
Dependent Claim
97 words
A lead-free or substantially lead-free hydrocarbon fuel composition for use in a spark ignited internal combustion engine which comprises a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a dimer acid, a trimer acid or a mixture of a dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and a lower alkyl aliphatic monohydric alcohol.
Claim 3
Dependent Claim
103 words
A lead-free or substantially lead-free hydrocarbon fuel composition for use in a spark ignited internal combustion engine which comprises a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a dimer acid, a trimer acid or a mixture of a dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and an aliphatic monohydric alcohol having from 1 to about 4 carbon atoms.
Claim 4
Dependent Claim
103 words
A lead-free or substantially lead-free hydrocarbon fuel composition for use in a spark ignited internal combustion engine which comprises a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a dimer acid, a trimer acid or a mixture of a dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and an aliphatic monohydric alcohol having from 1 to about 4 carbon atoms.
Claim 5
Dependent Claim
20 words
The composition of claim 2 containing from about 0.01 to about 10.0 grams of said polyester per gallon of fuel.
Claim 6
Dependent Claim
33 words
The composition of claim 3 wherein said polyester is the polyester of the reaction of the dicarboxylic acid dimer of oleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 7
Dependent Claim
18 words
The composition of claim 4 wherein said polyester is the dimethyl ester of the dimer of oleic acid.
Claim 8
Dependent Claim
18 words
The composition of claim 4 wherein said polyester is the di-isopropyl ester of the dimer of oleic acid.
Claim 9
Dependent Claim
19 words
The composition of claim 4 wherein said polyester is the di-tertiary butyl ester of the dimer of oleic acid.
Claim 10
Dependent Claim
33 words
The composition of claim 3 wherein said polyester is the polyester of the reaction of the tricarboxylic acid trimer of oleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 11
Dependent Claim
18 words
The composition of claim 8 wherein said polyester is the dimethyl ester of the trimer of oleic acid.
Claim 12
Dependent Claim
18 words
The composition of claim 8 wherein said polyester is the trimethyl ester of the trimer of oleic acid.
Claim 13
Dependent Claim
18 words
The composition of claim 8 wherein said polyester is the di-isopropyl ester of the trimer of oleic acid.
Claim 14
Dependent Claim
18 words
The composition of claim 8 wherein said polyester is the tri-isopropyl ester of the trimer of oleic acid.
Claim 15
Dependent Claim
19 words
The composition of claim 8 wherein said polyester is the di-tertiary butyl ester of the trimer of oleic acid.
Claim 16
Dependent Claim
19 words
The composition of claim 8 wherein said polyester is the tri-tertiary butyl ester of the trimer of oleic acid.
Claim 17
Dependent Claim
39 words
The composition of claim 3 wherein said polyester comprises a mixture of the C 1 -C 4 alcohol diesters of the dimer of oleic acid and the C 1 -C 4 alcohol triesters of the trimer of oleic acid.
Claim 18
Dependent Claim
33 words
The composition of claim 3 wherein said polyester is the polyester of the reaction of the dicarboxylic acid dimer of linoleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 19
Dependent Claim
18 words
The composition of claim 16 wherein said polyester is the dimethyl ester of the dimer of linoleic acid.
Claim 20
Dependent Claim
18 words
The composition of claim 16 wherein said polyester is the di-isopropyl ester of the dimer of linoleic acid.
Claim 21
Dependent Claim
19 words
The composition of claim 16 wherein said polyester is the di-tertiary butyl ester of the dimer of linoleic acid.
Claim 22
Dependent Claim
33 words
The composition of claim 3 wherein said polyester is the polyester of the reaction of the tricarboxylic acid trimer of linoleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 23
Dependent Claim
18 words
The composition of claim 20 wherein said polyester is the dimethyl ester of the trimer of linoleic acid.
Claim 24
Dependent Claim
18 words
The composition of claim 20 wherein said polyester is the trimethyl ester of the trimer of linoleic acid.
Claim 25
Dependent Claim
18 words
The composition of claim 20 wherein said polyester is the di-isopropyl ester of the trimer of linoleic acid.
Claim 26
Dependent Claim
18 words
The composition of claim 20 wherein said polyester is the tri-isopropyl ester of the trimer of linoleic acid.
Claim 27
Dependent Claim
19 words
The composition of claim 20 wherein said polyester is the di-tertiary butyl ester of the trimer of linoleic acid.
Claim 28
Dependent Claim
19 words
The composition of claim 20 wherein said polyester is the tri-tertiary butyl ester of the trimer of linoleic acid.
Claim 29
Dependent Claim
39 words
The composition of claim 3 wherein said polyester comprises a mixture of the C 1 -C 4 alcohol diesters of the dimer of linoleic acid and the C 1 -C 4 alcohol triesters of the trimer of linoleic acid.
Claim 30
Dependent Claim
16 words
The composition of claim 2 wherein said cyclopentadienyl manganese antiknock compound is a cyclopentadienyl manganese tricarbonyl.
Claim 31
Dependent Claim
19 words
The composition of claim 28 wherein said cyclopentadienyl group is a hydrocarbon group containing 5 to 17 carbon atoms.
Claim 32
Dependent Claim
11 words
The composition of claim 29 wherein said cyclopentadienyl group is methylcyclopentadienyl.
Claim 33
Dependent Claim
23 words
The composition of claim 30 containing from about 0.005 to about 10.0 grams of manganese per gallon of gasoline as methylcyclopentadienyl manganese tricarbonyl.
Claim 34
Dependent Claim
20 words
The composition of claim 31 containing from about 0.01 to about 10.0 grams of said polyester per gallon of fuel.
Claim 35
Dependent Claim
33 words
The composition of claim 32 wherein said polyester is the polyester of the reaction of the dicarboxylic acid dimer of oleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 36
Dependent Claim
18 words
The composition of claim 33 wherein said polyester is the dimethyl ester of the dimer of oleic acid.
Claim 37
Dependent Claim
18 words
The composition of claim 33 wherein said polyester is the di-isopropyl ester of the dimer of oleic acid.
Claim 38
Dependent Claim
18 words
The composition of claim 33 wherein said polyester is di-tertiary butyl ester of the dimer of oleic acid.
Claim 39
Dependent Claim
33 words
The composition of claim 32 wherein said polyester is the polyester of the reaction of the tricarboxylic acid trimer of oleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 40
Dependent Claim
18 words
The composition of claim 27 wherein said polyester is the dimethyl ester of the trimer of oleic acid.
Claim 41
Dependent Claim
18 words
The composition of claim 37 wherein said polyester is the trimethyl ester of the timer of oleic acid.
Claim 42
Dependent Claim
18 words
The composition of claim 37 wherein said polyester is the di-isopropyl ester of the trimer of oleic acid.
Claim 43
Dependent Claim
18 words
The composition of claim 37 wherein said polyester is the tri-isopropyl ester of the trimer of oleic acid.
Claim 44
Dependent Claim
19 words
The composition of claim 37 wherein said polyester is a di-tertiary butyl ester of the trimer of oleic acid.
Claim 45
Dependent Claim
19 words
The composition of claim 37 wherein said polyester is the tri-tertiary butyl ester of the trimer of oleic acid.
Claim 46
Dependent Claim
39 words
The composition of claim 32 wherein said polyester comprises a mixture of the C 1 -C 4 alcohol diesters of the dimer of oleic acid and the C 1 -C 4 alcohol triesters of the trimer of oleic acid.
Claim 47
Dependent Claim
33 words
The composition of claim 32 wherein said polyester is the polyester of the reaction of the dicarboxylic acid dimer of linoleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 48
Dependent Claim
18 words
The composition of claim 45 wherein said polyesters is the dimethyl ester of the dimer of linoleic acid.
Claim 49
Dependent Claim
18 words
The composition of claim 45 wherein said polyester is the di-isopropyl ester of the dimer of linoleic acid.
Claim 50
Dependent Claim
19 words
The composition of claim 45 wherein said polyester is the di-tertiary butyl ester of the dimer of linoleic acid.
Claim 51
Dependent Claim
30 words
The composition of claim 32 wherein said polyester is the reaction of the tricarboxylic acid trimer of linoleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 52
Dependent Claim
18 words
The composition of claim 49 wherein said polyester is the dimethyl ester of the trimer of linoleic acid.
Claim 53
Dependent Claim
18 words
The composition of claim 49 wherein said polyester is the trimethyl ester of the trimer of linoleic acid.
Claim 54
Dependent Claim
18 words
The composition of claim 49 wherein said polyester is the di-isopropyl ester of the trimer of linoleic acid.
Claim 55
Dependent Claim
18 words
The composition of claim 49 wherein said polyester is the tri-isopropyl ester of the trimer of linoleic acid.
Claim 56
Dependent Claim
19 words
The composition of claim 49 wherein said polyester is the di-tertiary butyl ester of the trimer of linoleic acid.
Claim 57
Dependent Claim
19 words
The composition of claim 49 wherein said polyester is the tri-tertiary butyl ester of the trimer of linoleic acid.
Claim 58
Dependent Claim
39 words
The composition of claim 32 wherein said polyester comprises a mixture of the C 1 -C 4 alcohol diesters of the dimer of linoleic acid and the C 1 -C 4 alcohol triesters of the trimer of linoleic acid.
Claim 59
Independent Claim
108 words
A method of operating a spark ignited internal combustion engine, said method comprising burning in said engine a lead-free or substantially lead-free hydrocarbon fuel composition comprising a mixture of a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a dimer acid, a trimer acid or a mixture of a dimer and a trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and a lower alkyl aliphatic monohydric alcohol.
Claim 60
Independent Claim
108 words
A method of operating a spark ignited internal combustion engine, said method comprising burning in said engine a lead-free or substantially lead-free hydrocarbon fuel composition comprising a mixture of a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a dimer acid, a trimer acid or a mixture of a dimer and a trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and a lower alkyl aliphatic monohydric alcohol.
Claim 61
Independent Claim
113 words
A method of operating a spark ignited internal combustion engine, said method comprising burning in said engine a lead-free or substantially lead-free hydrocarbon fuel composition comprising a mixture of a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a dimer acid, a trimer acid or a mixture of a dimer and a trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and an aliphatic monohydric alcohol having from 1 to 4 carbon atoms.
Claim 62
Independent Claim
113 words
A method of operating a spark ignited internal combustion engine, said method comprising burning in said engine a lead-free or substantially lead-free hydrocarbon fuel composition comprising a mixture of a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a dimer acid, a trimer acid or a mixture of a dimer and a trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and an aliphatic monohydric alcohol having from 1 to 4 carbon atoms.
Claim 63
Dependent Claim
24 words
The method of claim 58 wherein said fuel composition contains from about 0.01 to about 10.0 grams of said polyester per gallon of fuel.
Claim 64
Dependent Claim
33 words
The method of claim 59 wherein said polyester is the polyester of the reaction of the dicarboxylic acid dimer of oleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 65
Dependent Claim
33 words
The method of claim 59 wherein said polyester is the polyester of the reaction of the tricarboxylic acid trimer of oleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 66
Dependent Claim
39 words
The method of claim 59 wherein said polyester comprises a mixture of the C 1 -C 4 alcohol diesters of the dimer of oleic acid and the C 1 -C 4 alcohol triesters of the trimer of oleic acid.
Claim 67
Dependent Claim
33 words
The method of claim 59 wherein said polyester is the polyester of the reaction of the dicarboxylic acid dimer of linoleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 68
Dependent Claim
33 words
The method of claim 59 wherein said polyester is the polyester of the reaction of the tricarboxylic acid trimer of linoleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 69
Dependent Claim
39 words
The method of claim 59 wherein said polyester comprises a mixture of the C 1 -C 4 alcohol diesters of the dimer of linoleic acid and the C 1 -C 4 alcohol triesters of the trimer of linoleic acid.
Claim 70
Dependent Claim
15 words
The method of claim 59 wherein said cyclopentadienyl manganese compound is a cyclopentadienyl manganese tricarbonyl.
Claim 71
Dependent Claim
19 words
The method of claim 66 wherein said cyclopentadienyl group is a hydrocarbon group containing 5 to 17 carbon atoms.
Claim 72
Dependent Claim
11 words
The method of claim 67 wherein said cyclopentadienyl group is methylcyclopentadienyl.
Claim 73
Dependent Claim
23 words
The method of claim 68 containing from about 0.005 to about 10.0 grams of manganese per gallon of gasoline as methylcyclopentadienyl manganese tricarbonyl.
Claim 74
Dependent Claim
33 words
The method of claim 69 wherein said polyester is the polyester of the reaction of the dicarboxylic acid dimer of oleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 75
Dependent Claim
33 words
The method of claim 69 wherein said polyester is the polyester of the reaction of the tricarboxylic acid trimer of oleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 76
Dependent Claim
39 words
The method of claim 69 wherein said polyester comprises a mixture of the C 1 -C 4 alcohol diesters of the dimer of oleic acid and the C 1 -C 4 alcohol triesters of the trimer of oleic acid.
Claim 77
Dependent Claim
33 words
The method of claim 69 wherein said polyester is the polyester of the reaction of the dicarboxylic acid dimer of linoleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 78
Dependent Claim
33 words
The method of claim 69 wherein said polyester is the polyester of the reaction of the tricarboxylic acid trimer of linoleic acid and an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 79
Dependent Claim
39 words
The method of claim 69 wherein said polyester comprises a mixture of the C 1 -C 4 alcohol diesters of the dimer of linoleic acid and the C 1 -C 4 alcohol triesters of the trimer of linoleic acid.
Claim 80
Dependent Claim
155 words
A lead-free or substantially lead-free hydrocarbon fuel composition for use in a spark ignited internal combustion engine which comprises a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and from about 0.01 to about 10.0 grams of an exhaust emission reducing mixture comprising from about 10% to about 90% by weight of a compound selected from (1) a polycarboxylic dimer acid, a polycarboxylic trimer acid or a mixture of a polycarboxylic dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule, and (2) from about 90% to about 10% by weight of a compound selected from the corresponding lower alkyl polyesters of said polycarboxylic dimer and trimer acids prepared by reacting said polycarboxylic dimer and trimer acids with a lower alkyl aliphatic monohydric alcohol having from 1 to about 4 carbon atoms.
Claim 81
Dependent Claim
155 words
A lead-free or substantially lead-free hydrocarbon fuel composition for use in a spark ignited internal combustion engine which comprises a major amount of hydrocarbons boiling in the gasoline boiling range, a cyclopentadienyl manganese antiknock compound and from about 0.01 to about 10.0 grams of an exhaust emission reducing mixture comprising from about 10% to about 90% by weight of a compound selected from (1) a polycarboxylic dimer acid, a polycarboxylic trimer acid or a mixture of a polycarboxylic dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule, and (2) from about 90% to about 10% by weight of a compound selected from the corresponding lower alkyl polyesters of said polycarboxylic dimer and trimer acids prepared by reacting said polycarboxylic dimer and trimer acids with a lower alkyl aliphatic monohydric alcohol having from 1 to about 4 carbon atoms.
Claim 82
Dependent Claim
33 words
The composition of claim 76 wherein said unsaturated aliphatic monocarboxylic acid is oleic acid and said polyesters are the C 1 -C 4 alcohol esters of the dimers and trimers of oleic acid.
Claim 83
Dependent Claim
16 words
The composition of claim 77 wherein said cyclopentadienyl manganese antiknock compound is a cyclopentadienyl manganese tricarbonyl.
Claim 84
Dependent Claim
19 words
The composition of claim 78 wherein said cyclopentadienyl group is a hydrocarbon group containing 5 to 17 carbon atoms.
Claim 85
Dependent Claim
11 words
The composition of claim 79 wherein said cyclopentadienyl group is methylcyclopentadienyl.
Claim 86
Dependent Claim
22 words
The composition of claim 80 containing the 0.005 to about 10.0 grams of manganese per gallon of fuel as methylcyclopentadienyl manganese tricarbonyl.
Claim 87
Dependent Claim
33 words
The composition of claim 76 wherein said unsaturated aliphatic monocarboxylic acid is linoleic acid and said polyesters are the C 1 -C 4 alcohol esters of the dimers and trimers of linoleic acid.
Claim 88
Dependent Claim
15 words
The composition of claim 82 wherein said cyclopentadienyl manganese antiknock compound is cyclopentadienyl manganese tricarbonyl.
Claim 89
Dependent Claim
19 words
The composition of claim 83 wherein said cyclopentadienyl group is a hydrocarbon group containing 5 to 17 carbon atoms.
Claim 90
Dependent Claim
12 words
The composition of claim 84 wherein said cyclopentadienyl group is methyl cyclopentadienyl.
Claim 91
Dependent Claim
22 words
The composition of claim 85 containing from 0.005 to about 10.0 grams of manganese per gallon of fuel as methylcyclopentadienyl manganese tricarbonyl.
Claim 92
Dependent Claim
107 words
A hydrocarbon exhaust emission reducing additive fluid concentrate for use in lead-free or substantially lead-free gasoline which comprises a cyclopentadienyl manganese antiknock compound in an amount sufficient to improve the antiknock characteristics of said gasoline and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a polycarboxylic dimer acid, a polycarboxylic trimer acid or a mixture of a polycarboxylic dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and a lower alkyl monohydric alcohol having from 1 to about 4 carbon atoms.
Claim 93
Dependent Claim
107 words
A hydrocarbon exhaust emission reducing additive fluid concentrate for use in lead-free or substantially lead-free gasoline which comprises a cyclopentadienyl manganese antiknock compound in an amount sufficient to improve the antiknock characteristics of said gasoline and an exhaust emission reducing amount of a polyester prepared from the reaction of a compound selected from a polycarboxylic dimer acid, a polycarboxylic trimer acid or a mixture of a polycarboxylic dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from 16 to about 22 carbon atoms per molecule and a lower alkyl monohydric alcohol having from 1 to about 4 carbon atoms.
Claim 94
Dependent Claim
45 words
The additive fluid concentrate of claim 87 comprising from about 200 parts by weight polyester to about 1 part by weight manganese as methylcyclopentadienyl manganese tricarbonyl and from about 1 part by weight polyester to about 100 parts by weight manganese as methylcyclopentadienyl manganese tricarbonyl.
Claim 95
Dependent Claim
42 words
The additive fluid concentration of claim 88 sufficient to provide from about 0.005 to about 10.0 grams of manganese per gallon of gasoline as methylcyclopentadienyl manganese tricarbonyl and from about 0.01 to about 10.0 grams of said polyester per gallon of fuel.
Claim 96
Dependent Claim
130 words
A hydrocarbon exhaust emission reducing additive fluid concentrate for use in a lead-free or substantially lead-free gasoline which comprises a cyclopentadienyl manganese antiknock compound in an amount sufficient to improve the antiknock characteristics of said gasoline and an exhaust emission reducing amount of an additive agent comprising a mixture of (1) a polycarboxylic dimer acid, a polycarboxylic trimer acid or a mixture of a polycarboxylic dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from about 16 to about 22 carbon atoms per molecule, and (2) the corresponding lower alkyl polyesters of said polycarboxylic dimer and trimer acids prepared by reacting said polycarboxylic dimer and trimer acids with a lower alkyl aliphatic monohydric alcohol having from 1 to about 4 carbon atoms.
Claim 97
Dependent Claim
130 words
A hydrocarbon exhaust emission reducing additive fluid concentrate for use in a lead-free or substantially lead-free gasoline which comprises a cyclopentadienyl manganese antiknock compound in an amount sufficient to improve the antiknock characteristics of said gasoline and an exhaust emission reducing amount of an additive agent comprising a mixture of (1) a polycarboxylic dimer acid, a polycarboxylic trimer acid or a mixture of a polycarboxylic dimer and trimer acid produced by the polymerization or condensation of an unsaturated aliphatic monocarboxylic acid having from about 16 to about 22 carbon atoms per molecule, and (2) the corresponding lower alkyl polyesters of said polycarboxylic dimer and trimer acids prepared by reacting said polycarboxylic dimer and trimer acids with a lower alkyl aliphatic monohydric alcohol having from 1 to about 4 carbon atoms.
Claim 98
Dependent Claim
52 words
The additive fluid concentrate of claim 90 comprising from about 200 parts by weight hydrocarbon exhaust emission reducing agent to about 1 part by weight manganese as methylcyclopentadienyl manganese tricarbonyl and from 1 part by weight hydrocarbon exhaust emission reducing agent to about 100 parts by weight manganese as methylcyclopentadienyl manganese tricarbonyl.
Claim 99
Dependent Claim
44 words
The additive fluid concentrate of claim 91 sufficient to provide from about 0.005 to about 10.0 grams of manganese as methylcyclopentadienyl manganese tricarbonyl per gallon of gasoline and from about 0.1 to about 10.0 grams of exhaust emission reducing agent per gallon of gasoline.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |