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US3678079A
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US
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Fibrous glass filled polycarbonate resins
Assignee: General Electric Co
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Filing: 1972-01-04
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Granted: 1972-07-18
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Expires: 1992-01-04
Abstract
Abstract An aromatic carbonate polymer having uniformly dispersed therein finely divided fibrous glass filaments. The glass filaments employed herein are those that have been treated or coated with a particular binding agent, namely a styrene-ethyl acrylate copolymer.
Inventors
- 👤 Edward J Carty
- 👤 Francis C Mcdowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:09
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/28; C03C25/285; C08K; C08K9/00; C08K9/08; C08L; C08L69/00; C08J2369/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
The composition of claim 1 wherein the carbonate polymer contains from about 5 to about 50 weight percent of the fibrous glass based on the total weight of the composition.
Claim 2
Dependent Claim
14 words
The composition of claim 1 wherein the carbonate polymer is a homopolymer of bisphenol-A.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherein the carbonate polymer is a copolymer of at least 35 weight percent of bisphenol-A with the balance being tetrachlorobisphenol-A.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein the carbonate precursor is phosgene.
Claim 5
Dependent Claim
43 words
The composition of claims 1 wherein the carbonate polymer is a blend of (1) at least 70 weight percent of a homopolymer of bisphenol-A and (2) the balance being a copolymer of 60-35 weight percent of tetrabromobisphenol-A and correspondingly 40-65 percent of bisphenol-A.
References Cited (Backward Citations)
US3488317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |