US4535104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet light stabilized copolyestercarbonate
Assignee: General Electric Co
•
Filing: 1984-07-20
•
Granted: 1985-08-13
•
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 08:00
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.
References Cited (Backward Citations)
US3004896A
Cited
US3322719A
Cited
US3892889A
Cited
US3864354A
Cited
US3823113A
Cited
US4089839A
Cited
US4278589A
Cited
US4283327A
Cited
US4235999A
Cited
US4278590A
Cited
US4403053A
Cited
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 |