Patent US4535104A successfully refreshed from Google Patents.
US4535104A
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Ultraviolet light stabilized copolyestercarbonate
Assignee: General Electric Co
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Filing: 1984-07-20
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Granted: 1985-08-13
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Expires: 2004-07-20
Abstract
Abstract A composition comprising an aromatic copolyestercarbonate article surface impregnated with an ultraviolet light degradation inhibiting effective amount of a compound of the formula ##STR1## wherein R is hydrogen or alkyl of one to twelve carbon atoms, inclusive.
Inventors
- 👤 Robert A. Pyles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
37 words
A composition comprising an aromatic copolyestercarbonate article surface impregnated with an ultraviolet light degradation inhibiting effective amount of a compound of the formula ##STR7## wherein R is hydrogen or alkyl of one to twelve carbon atoms, inclusive.
Claim 2
Dependent Claim
37 words
A composition comprising an aromatic copolyestercarbonate article surface impregnated with an ultraviolet light degradation inhibiting effective amount of a compound of the formula ##STR7## wherein R is hydrogen or alkyl of one to twelve carbon atoms, inclusive.
Claim 3
Dependent Claim
23 words
A composition in accordance with claim 1 wherein the mole percent ester of the copolyestercarbonate is from about 25 to 90 mole percent.
Claim 4
Dependent Claim
17 words
A composition in accordance with claim 2 wherein the aromatic ester in the copolyestercarbonate is predominantly isophthalate.
Claim 5
Dependent Claim
17 words
A composition in accordance with claim 2 wherein the aromatic ester in the copolyestercarbonate is predominantly terephthalate.
Claim 6
Dependent Claim
18 words
A composition in accordance with claim 3 wherein a dihydric phenol used in making the copolyestercarbonate is bisphenol-A.
Claim 7
Dependent Claim
18 words
A composition in accordance with claim 4 wherein a dihydric phenol used in making the copolyestercarbonate is bisphenol-A.
Claim 8
Dependent Claim
11 words
A composition in accordance with claim 2 wherein R is hydrogen.
Claim 9
Dependent Claim
11 words
A composition in accordance with claim 2 wherein R is methyl.
Claim 10
Dependent Claim
18 words
A composition in accordance with claim 2 wherein R is alkyl of six to twelve carbon atoms, inclusive.
Claim 11
Dependent Claim
11 words
A composition in accordance with claim 9 wherein R is octyl.
Claim 12
Dependent Claim
11 words
A composition in accordance with claim 9 wherein R is ##STR8##
Claim 13
Dependent Claim
20 words
A composition in accordance with claim 1 wherein the copolyestercarbonate has from about 35 to 80 mole percent ester bonds.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |