US4252916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable translucent polycarbonate compositions
Assignee: General Electric Co
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Filing: 1978-12-06
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Granted: 1981-02-24
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Expires: 1998-12-06
Abstract
Abstract Thermally stable translucent polycarbonate compositions comprising an admixture of an aromatic polycarbonate and a minor amount of a partially fluorinated polyolefin.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:46
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
52 words
A thermally stable translucent polycarbonate composition consisting essentially of an admixture of an aromatic polycarbonate and a minor amount of a partially fluorinated polyolefin selected from the group consisting of poly(vinylidene fluoride), poly(vinyl fluoride), poly(trifluoroethylene), poly(chlorotrifluoroethylene), and poly(trifluoroethylene alkali metal sulfonate) or mixtures of said partially fluorinated polyolefin with poly(tetrafluoroethylene) and poly(hexafluoropropylene).
Claim 2
Dependent Claim
52 words
A thermally stable translucent polycarbonate composition consisting essentially of an admixture of an aromatic polycarbonate and a minor amount of a partially fluorinated polyolefin selected from the group consisting of poly(vinylidene fluoride), poly(vinyl fluoride), poly(trifluoroethylene), poly(chlorotrifluoroethylene), and poly(trifluoroethylene alkali metal sulfonate) or mixtures of said partially fluorinated polyolefin with poly(tetrafluoroethylene) and poly(hexafluoropropylene).
Claim 3
Dependent Claim
38 words
The composition of claim 1 wherein the partially fluorinated polyolefin or partially fluorinated polyolefin-fully fluorinated polyolefin mixture is present in an amount of from 0.01 to about 5.0 weight percent based on the weight of the polycarbonate composition.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said partially fluorinated polyolefin is poly(vinylidene fluoride).
Claim 5
Dependent Claim
17 words
The composition of claim 1 in which the aromatic carbonate polymer is the reaction product of 2,2-bis(4-hydroxyphenyl)propane.
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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |