US4289870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,2',6,6'-Tetramethylbiphenyl-4,4'-diol polyesters
Assignee: BP Corp North America Inc
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Filing: 1979-10-03
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Granted: 1981-09-15
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Expires: 1999-10-03
Abstract
Abstract A polyester comprising units of a dicarboxylic acid component and dihydroxy component wherein said dicarboxylic acid component comprises non-vicinal benzene dicarboxylate moieties and said dihydroxy component comprises 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties.
Inventors
- 👤 John A. Donohue
- 👤 Edward E. Paschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
29 words
A polyester comprising units of a dicarboxylic acid component and dihydroxy component wherein said dicarboxylic acid component comprises non-vicinal benzene dicarboxylate moieties and said dihydroxy component comprises 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties.
Claim 2
Dependent Claim
29 words
A polyester comprising units of a dicarboxylic acid component and dihydroxy component wherein said dicarboxylic acid component comprises non-vicinal benzene dicarboxylate moieties and said dihydroxy component comprises 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties.
Claim 3
Dependent Claim
19 words
The polyester of claim 1 wherein said 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties comprise 5 to 100 mole percent of the dihydroxy component.
Claim 4
Dependent Claim
14 words
The polyester of claim 2 wherein said non-vicinal benzene dicarboxylate moieties comprise isophthalate moieties.
Claim 5
Dependent Claim
14 words
The polyester of claim 2 wherein said non-vicinal benzene dicarboxylate moieties comprise terephthalate moieties.
Claim 6
Dependent Claim
25 words
The polyester of claim 4 wherein the non-vicinal benzene dicarboxylate moieties comprise at least 80 mole percent of the dicarboxylic acid moieties in the polyester.
Claim 7
Dependent Claim
13 words
The polyester of claim 5 wherein the dihydroxy component comprises ethylene glycol moieties.
Claim 8
Dependent Claim
31 words
The polyester of claim 6 wherein 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties comprise about 5 to 30 mole percent of the dihydroxy component moieties in the polyester and the ethylene glycol moieties comprise the remainder.
Claim 9
Dependent Claim
33 words
The polyester of claim 1 wherein said dicarboxylic acid component comprises at least 80 mole percent non-vicinal benzene dicarboxylate moieties and said dihydroxy component comprises at least 80 mole percent aromatic diol moieties.
Claim 10
Dependent Claim
14 words
The polyester of claim 8 wherein said aromatic diol moieties comprise Bisphenol A moieties.
Claim 11
Dependent Claim
20 words
The polyester of claim 8 wherein said dihydroxy component comprises at least 80 mole percent Bisphenol A and 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties.
Claim 12
Dependent Claim
19 words
A polyester comprising units of a dicarboxylic acid component and dihydroxy component wherein said dihydroxy component comprises 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties.
Claim 13
Dependent Claim
19 words
A polyester comprising units of a dicarboxylic acid component and dihydroxy component wherein said dihydroxy component comprises 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties.
Claim 14
Dependent Claim
19 words
The polyester of claim 11 wherein said 2,2',6,6'-tetramethylbiphenyl-4,4'-diol moieties comprise 5 to 100 mole percent of the dihydroxy component.
Claim 15
Dependent Claim
23 words
The polyester of claim 12 wherein the dicarboxylic acid component comprises moieties of aliphatic dicarboxylic acid having from 4 to 26 carbon atoms.
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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |