US4035342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyesters containing 2,2',6,6'-tetramethylbiphenyl-4,4'-dicarboxylate moieties
Assignee: BP Corp North America Inc
•
Filing: 1975-10-15
•
Granted: 1977-07-12
•
Expires: 1995-10-15
Abstract
Abstract This invention relates to a new family of resins which are essentially linear copolyesters comprising units of a polyhydric alcohol component comprising at least one dihydric alcohol moiety and a dicarboxylate component wherein said dicarboxylate component comprises terephthalate moieties and 2,2' ,6,6'-tetramethylbiphenyl-4,4'-dicarboxylate moieties in a range of mole ratios of from 19:1 to 1:19.
Inventors
- 👤 Edward E. Paschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/185
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
34 words
A high molecular weight polyester comprising a polyhydroxy component and polycarboxylic acid component wherein said dicarboxylate component comprises terephthalate moieties and 2,2',6,6'-tetramethylbiphenyl-4,4'-dicarboxylate moieties in a range of mole ratios of from 19:1 to 1:19.
Claim 2
Dependent Claim
34 words
A high molecular weight polyester comprising a polyhydroxy component and polycarboxylic acid component wherein said dicarboxylate component comprises terephthalate moieties and 2,2',6,6'-tetramethylbiphenyl-4,4'-dicarboxylate moieties in a range of mole ratios of from 19:1 to 1:19.
Claim 3
Dependent Claim
25 words
The polyester of claim 1 wherein said polyester is essentially linear and said polyhydroxy component comprises alkylene glycol moieties containing 2 to 12 carbon atoms.
Claim 4
Dependent Claim
13 words
The polyester of claim 2 wherein said polyhydroxy component comprises ethylene glycol moieties.
Claim 5
Dependent Claim
30 words
The polyester of claim 3 wherein the said range of said dicarboxylate components comprises the series of mole ratios, terephthalate moieties to 2,2',6,6'-tetramethylbiphenyl -4,4'-dicarboxylate moieties, of from 19:1 to 4:1.
Claim 6
Dependent Claim
30 words
The polyester of claim 3 wherein the said range of said dicarboxylate components comprises the series of mole ratios, terephthalate moieties to 2,2',6,6'-tetramethylbiphenyl -4,4'-dicarboxylate moieties, of from 19:1 to 3:2.
Claim 7
Dependent Claim
29 words
The polyester of claim 3 wherein the said range of said dicarboxylate components comprises the series of mole ratios, terephthalate moieties to 2,2',6,6'-tetramethylbiphenyl-4,4'-dicarboxylate moieties of from 19:1 to 2:3.
Claim 8
Dependent Claim
30 words
The polyester of claim 3 wherein the said range of said dicarboxylate components comprises the series of the mole ratios, terephthalate moieties to 2,2',6,6'-tetramethylbiphenyl-4,4'-dicarboxylate moieties, of from 19:1 to 1:4.
Claim 9
Dependent Claim
13 words
The polyester of claim 2 wherein said polyhydroxy component comprises butylene glycol moieties.
References Cited (Backward Citations)
US3257452A
Cited
JPS4843670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |