Patent US4154922A successfully refreshed from Google Patents.
US4154922A
Expired / Lapsed
US
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Polyesters of methyl-substituted polyphenylcarboxylic acids
Assignee: BP Corp North America Inc
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Filing: 1975-10-15
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Granted: 1979-05-15
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Expires: 1995-10-15
Abstract
Abstract Methyl-substituted polyphenylacyl compounds are prepared by selective oxidation of oligomers of mesitylene. These methyl-substituted polyphenylacyl compounds are useful as intermediates for polyamides and polyesters. The esters are useful as plasticizers for polyvinylchloride.
Inventors
- 👤 John A. Donohue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:27
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C07; C07C; C07C63/00; C07C63/33; C07C63/331; C07C63/333; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/185; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L77/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A resinous polymer of a methyl-substituted polyphenylcarboxylic acid compound wherein the said polymer has the structural formula ##STR8## wherein n comprises a whole number from 1 to 3 inclusive, L is --O--, Z is selected from the group consisting of divalent aliphatic moietics and divalent aromatic moieties, m is a number of recurring units wherein the said resinous polymer has an inherent viscosity of at least 0.20 dl/g in a 60/40 phenol-tetrachloroethane solvent at 30° C.
Claim 2
Dependent Claim
76 words
A resinous polymer of a methyl-substituted polyphenylcarboxylic acid compound wherein the said polymer has the structural formula ##STR8## wherein n comprises a whole number from 1 to 3 inclusive, L is --O--, Z is selected from the group consisting of divalent aliphatic moietics and divalent aromatic moieties, m is a number of recurring units wherein the said resinous polymer has an inherent viscosity of at least 0.20 dl/g in a 60/40 phenol-tetrachloroethane solvent at 30° C.
Claim 3
Dependent Claim
25 words
The polymer of claim 1 wherein the said divalent aliphatic moiety comprises an alkylene group having 2 to 20 carbon atoms in the alkylene chain.
Claim 4
Dependent Claim
29 words
The polymer of claim 1 wherein said divalent aromatic moieties are selected from the group consisting of phenylene, biphenylene, diphenylene ether, diphenylenemethane, diphenylenesulfone, diphenylenesulfide, naphthylene, phenanthrylene and anthrylene moieties.
Claim 5
Dependent Claim
28 words
The polymer of claim 3 wherein said aromatic moieties comprise substituted moieties, said substitutions selected from the group of radicals consisting of lower alkyls, halogens, and nitro radicals.
Claim 6
Dependent Claim
12 words
The polymer of claim 1 wherein the said acid comprises 2,2',6,6'-tetramethylbiphenyl-4,4'-dicarboxylic acid.
Claim 7
Dependent Claim
13 words
The polymer of claim 5 wherein Z comprises ethylene and L is oxygen.
Claim 8
Dependent Claim
9 words
The polymer of claim 5 wherein Z comprises butylene.
Claim 9
Dependent Claim
24 words
The resinous polymer of claim 1 wherein the said polymer comprises a polyester of a methyl-substituted polyphenylcarboxylic acid compound and a polyhydric alcohol compound.
References Cited (Backward Citations)
JPS4843670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |