Patent US4264680A successfully refreshed from Google Patents.
US4264680A
Expired / Lapsed
US
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UV-Stabilized polycarbonates
Assignee: General Electric Co
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Filing: 1980-06-09
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Granted: 1981-04-28
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Expires: 2000-06-09
Abstract
Abstract Polycarbonate resins can be stabilized against the adverse influence of UV light by incorporating either directly into the resin or by means of a coating on the surface of the polycarbonate resin, an effective amount of a dicyano stabilizer.
Inventors
- 👤 Blair T. Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:25
CPC Classifications
C; C07; C07C; C07C255/00; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/315; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
A composition of matter comprising (1) a thermaplastic resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer of the formula ##STR9##
Claim 2
Dependent Claim
28 words
A composition of matter comprising (1) a thermaplastic resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer of the formula ##STR9##
Claim 3
Dependent Claim
31 words
A composition of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer comprising a compound having the formula ##STR10##
Claim 4
Dependent Claim
31 words
A composition of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer comprising a compound having the formula ##STR10##
Claim 5
Dependent Claim
30 words
A composition as in claim 2 wherein the UV stabilizer is present in an amount ranging from 0.5 to 10%, by weight, based on the weight of the polycarbonate resin.
Claim 6
Dependent Claim
20 words
A composition as in claim 2 wherein the polycarbonate resin is in the form of a film or thick sheet.
Claim 7
Dependent Claim
17 words
A composition as in claim 2 wherein the UV stabilizer is homogeneously dispersed throughout the polycarbonate resin.
Claim 8
Dependent Claim
53 words
A composition as in claim 2 wherein the polycarbonate resin being protected against the effects of ultraviolet light is so protected by means of a thin coating of a resinous composition containing the UV stabilizer dispersed homogeneously throughout the thin coating, which in turn is disposed on the surface of the polycarbonate substrate.
Claim 9
Dependent Claim
6 words
A compound of the formula ##STR11##
Claim 10
Dependent Claim
6 words
A compound of the formula ##STR11##
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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |