Patent US4981898A successfully refreshed from Google Patents.
US4981898A
Expired / Lapsed
US
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Polycarbonate-polyester blends
Assignee: General Electric Co
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Filing: 1987-12-31
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Granted: 1991-01-01
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Expires: 2007-12-31
Abstract
Abstract A composition comprising a blend of a polyester resin and a polycarbonate resin are provided with a transesterification reaction hindering amount of a metaphosphate fiber.
Inventors
- 👤 Walt H. Bassett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:30
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
24 words
A thermoplastic composition comprising: (a) a polycarbonate resin; (b) at least one polyester resin; and (c) a transesterification hindering amount of a metaphosphate fiber.
Claim 2
Dependent Claim
24 words
A thermoplastic composition comprising: (a) a polycarbonate resin; (b) at least one polyester resin; and (c) a transesterification hindering amount of a metaphosphate fiber.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein said polyester resin is a poly(butyl terephthalate(resin.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein the polyester resin is poly(1,4-butylene terephthalate).
Claim 5
Dependent Claim
26 words
The composition of claim 1 wherein the metaphosphate fibers are selected from the group of calcium metaphosphate fiber, sodium metaphosphate fiber, and calcium sodium metaphosphate fiber.
Claim 6
Dependent Claim
14 words
The composition of claim 4 wherein the metaphosphate fibers are calcium sodium metaphosphate fibers.
Claim 7
Dependent Claim
20 words
The composition of claim 5 wherein the polycarbonate resin is derived from a diphenol and phosgene or a phosgene precursor.
Claim 8
Dependent Claim
12 words
The composition of claim 6 wherein the polycarbonate resin is poly(bisphenol A)carbonate.
Claim 9
Dependent Claim
19 words
The composition of claim 1 wherein the said polyester resin comprises an admixture of poly(1,4-butylene terephthalate) and poly(ethylene terephthalate).
Claim 10
Dependent Claim
32 words
The composition of claim 1 which contains from about 0.01 parts to about 10 parts by weight of the metaphosphate fibers for every 100 parts by weight of the blended resin composition.
Claim 11
Dependent Claim
31 words
The composition of claim 9 which contains from about 0.1 to about 5 parts by weight of the metaphosphate fibers for every 100 parts by weight of the blended resin composition.
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) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |