US4123436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate composition plasticized with esters
Assignee: General Electric Co
•
Filing: 1976-12-16
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Granted: 1978-10-31
•
Expires: 1996-12-16
Abstract
Abstract A plasticized polycarbonate composition comprising in admixture a high molecular weight aromatic carbonate polymer and a minor amount of an ester.
Inventors
- 👤 Fred F. Holub
- 👤 Steven W. Scott
- 👤 Phillip S. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
A plasticized polycarbonate composition comprising a mechanical admixture of a high molecular weight aromatic carbonate polymer and about 0.05-5.0 parts per hundred parts of said aromatic carbonate polymer of an ester selected from the following group of esters: ##STR14##
Claim 2
Dependent Claim
39 words
A plasticized polycarbonate composition comprising a mechanical admixture of a high molecular weight aromatic carbonate polymer and about 0.05-5.0 parts per hundred parts of said aromatic carbonate polymer of an ester selected from the following group of esters: ##STR14##
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein the aromatic carbonate polymer is derived from bisphenol-A.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein the aromatic carbonate polymer is a copolymer derived from bisphenol-A and tetrabromo bisphenol-A.
References Cited (Backward Citations)
US3186961A
Cited
US3285255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |