Patent US4491455A successfully refreshed from Google Patents.
US4491455A
Expired / Lapsed
US
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Method for improving cold flow of fuel oils
Assignee: NOF Corp
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Filing: 1982-09-21
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Granted: 1985-01-01
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Expires: 2002-09-21
Abstract
Abstract The cold flow of fuel oils is improved by adding esters of nitrogen-containing compounds having polyhydroxyl groups with linear saturated fatty acids or a combination of said esters and polymers of one or more monomers selected from the group consisting of olefins, alkyl esters of ethylenically unsaturated carboxylic acids and vinyl esters of saturated fatty acids to fuel oils.
Inventors
- 👤 Takaharu Ishizaki
- 👤 Takeshi Nagai
- 👤 Shingo Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:13
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225; C10L1/143; C10L1/224; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1963; C10L1/1966; C10L1/197; C10L1/1973
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
35 words
A method for improving the cold flow of fuel oils comprising adding esters of nitrogen-containing compounds having polyhydroxyl groups with 2-10 hydroxyl groups, and linear saturated fatty acids having 12-30 carbon atoms to fuel oils.
Claim 2
Independent Claim
35 words
A method for improving the cold flow of fuel oils comprising adding esters of nitrogen-containing compounds having polyhydroxyl groups with 2-10 hydroxyl groups, and linear saturated fatty acids having 12-30 carbon atoms to fuel oils.
Claim 3
Independent Claim
31 words
A method for improving the cold flow of fuel oils comprising adding esters of nitrogen-containing compounds having polyhydroxyl groups having 2-10 hydroxyl groups, and linear saturated fatty acids to fuel oils.
Claim 4
Independent Claim
31 words
A method for improving the cold flow of fuel oils comprising adding esters of nitrogen-containing compounds having polyhydroxyl groups having 2-10 hydroxyl groups, and linear saturated fatty acids to fuel oils.
Claim 5
Independent Claim
31 words
A method for improving the cold flow of fuel oils comprising adding esters of nitrogen-containing compounds having polyhydroxyl groups and linear saturated fatty acids having 12-30 carbon atoms to fuel oils.
Claim 6
Independent Claim
31 words
A method for improving the cold flow of fuel oils comprising adding esters of nitrogen-containing compounds having polyhydroxyl groups and linear saturated fatty acids having 12-30 carbon atoms to fuel oils.
Claim 7
Dependent Claim
43 words
The method of claim 1 further comprising adding polymers of at least one monomer selected from the group consisting of: olefins having 2-30 carbon atoms, alkyl esters of ethylenically unsaturated carboxylic acids and vinyl esters of saturated fatty acids to said fuel oils.
Claim 8
Dependent Claim
30 words
A method as claimed in claim 4, wherein said alkyl esters of ethylenically unsaturated carboxylic acids are esters of ethylenically unsaturated carboxylic acids and saturated alcohols having 1-30 carbon atoms.
Claim 9
Dependent Claim
26 words
A method as claimed in claim 4, wherein said vinyl esters of saturated fatty acids are vinyl esters of saturated fatty acids having 1-30 carbon atoms.
Claim 10
Dependent Claim
44 words
A method for improving the cold flow of fuel oils according to claim 1 wherein said nitrogen-containing compound having polyhydroxyl groups is selected from the group consisting of: diethanolamine, methyldiethanolamine, ethyldiethanolamine, butyldiethanolamine, diisopropanolamine, methyldiisopropanolamine, ethyldiisopropanolamine, butyldiisopropanolamine, triethanolamine, triisopropanolamine, dimethylmono(dihydroxypropyl)amine, dibutylmono(dihydroxypropyl)amine, diethanolmono(dihydroxypropyl)amine, ethanolbis(dihydroxypropyl)amine, and tris(dihydroxypropyl)amine.
Claim 11
Dependent Claim
63 words
A method for improving the cold flow of fuel oils according to claim 1 wherein said linear saturated fatty acid is selected from the group consisting of: lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, behanic acid, lignoceric acid, melissic acid, coconut oil fatty acids, hydrogenated beef tallow fatty acids, hydrogenated rapeseed oil fatty acids, and hydrogenated fish oil fatty acids.
Claim 12
Dependent Claim
39 words
A method for improving the cold flow of fuel oils according to claim 4 wherein said olefin is selected from the group consisting of: ethylene, propylene, 1-butene, isobutene, 1-pentene, 1-hexene, 1-heptene, 1-octene, diisobutene, 1-dodecene, 1-octadecene, 1-eicosene, 1-tetracosene, and 1-triacontene.
Claim 13
Dependent Claim
60 words
A method for improving the cold flow of fuel oils according to claim 1 wherein said nitrogen-containing compound having polyhydroxyl groups is an addition product of (a) an epoxide selected from the group consisting of: ethylene oxide, propylene oxide, butylene oxide and glycidol; and (b) a polyamine selected from the group consisting of: ethylenediamine, propylenediamine, hexamethylenediamine, xylylenediamine, diethylenetriamine, and triethylenetetramine.
Claim 14
Dependent Claim
59 words
A method for improving the cold flow of fuel oils according to claim 1 wherein said nitrogen-containing compound having polyhydroxyl groups is an amide of (a) an amine selected from the group consisting of: diethanolamine and diisopropanolamine; and (b) a fatty acid selected from the group consisting of: lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |