Patent US692375A successfully refreshed from Google Patents.
Patent US4776913A successfully refreshed from Google Patents.
US4776913A
Expired / Lapsed
US
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Method of impregnating an ultraviolet radiation screener into the surface of polycarbonate article
Assignee: General Electric Co
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Filing: 1986-12-23
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Granted: 1988-10-11
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Expires: 2006-12-23
Abstract
Abstract A method for impregnating at least one surface of an aromatic carbonate resin article with an ultraviolet radiation screener comprising applying a protective masking element to at least one surface of said article, said protective masking element having disposed on the surface thereof which is in contact with said surface of said aromatic carbonate resin article an adhesive layer containing an effective amount of at least one ultraviolet radiation absorber, while said surface of said article is at a temperature sufficiently high for said ultraviolet radiation screener to migrate from said adhesive layer into the surface of said article in ultraviolet radiation screening effective amounts.
Inventors
- 👤 John C. Goossens
- 👤 Herbert L. Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:41
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/32; B29; B29C; B29C48/00; B29C48/022; B29C71/00; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/06; C08J7/065; B29C71/0009; B29C2071/0018; B29C48/03; B29C48/07; B29C48/08; B29K; B29K2069/00; B29K2105/00; B29K2105/0005; B29K2105/0047; B29K2105/005; C08J2369/00; C08J2433/00; Y; Y10; Y10T; Y10T156/00; Y10T156/11; Y10T156/1153; Y10T156/1158; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
120 words
A method for impregnating at least one surface layer of an aromatic carbonate resin article with an ultraviolet radiation screener comprising applying a protective masking element to at least one surface of said article, said protective masking element having disposed on the surface thereof which is in contact with said surface of said aromatic carbonate resin article an adhesive layer containing an effective amount of at least one ultraviolet radiation screener, while said surface of said article is at a temperature effective for said ultraviolet radiation screener to migrate from said adhesive layer into the surface of said article in an effective quantity to provide protection thereto from ultraviolet radiation, said protective masking element being removably adhered to said article.
Claim 2
Independent Claim
120 words
A method for impregnating at least one surface layer of an aromatic carbonate resin article with an ultraviolet radiation screener comprising applying a protective masking element to at least one surface of said article, said protective masking element having disposed on the surface thereof which is in contact with said surface of said aromatic carbonate resin article an adhesive layer containing an effective amount of at least one ultraviolet radiation screener, while said surface of said article is at a temperature effective for said ultraviolet radiation screener to migrate from said adhesive layer into the surface of said article in an effective quantity to provide protection thereto from ultraviolet radiation, said protective masking element being removably adhered to said article.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said effective quantity is an ultraviolet radiation absorbing effective amount.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said aromatic carbonate resin article is an extruded article.
Claim 5
Dependent Claim
16 words
The method of claim 3 wherein said extruded article is in the form of a sheet.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein said temperature is at least about 30° C.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein said aromatic carbonate resin is an aromatic polycarbonate resin.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein said aromatic carbonate resin is an aromatic copolyester-carbonate resin.
Claim 9
Dependent Claim
16 words
The method of claim 3 wherein said extruded article is in the form of a film.
Claim 10
Dependent Claim
16 words
The method of claim 1 wherein said adhesive layer is comprised of a pressure sensitive adhesive.
Claim 11
Dependent Claim
15 words
The method of claim 9 wherein said adhesive layer is comprised of an acrylic polymer.
Claim 12
Dependent Claim
15 words
The method of claim 10 wherein said acrylic polymer is a rubber modified acrylic polymer.
Claim 13
Dependent Claim
25 words
The method of claim 1 wherein said adhesive layer contains from about 3 to about 40 weight percent of at least one ultraviolet radiation screener.
Claim 14
Dependent Claim
23 words
The method of claim 1 wherein said ultraviolet radiation screener is selected from benzophenone derivatives, benzotriazole derivatives, benzylidene malonates, cyanoacrylate, or mixtures thereof.
Claim 15
Dependent Claim
14 words
The method of claim 1 wherein said temperature is at least about 35° C.
Claim 16
Dependent Claim
14 words
The method of claim 14 wherein said temperature is at most about 140° C.
Claim 17
Dependent Claim
36 words
The method of claim 1 wherein said article is extruded at temperature above 35° C., said protective masking element being applied to said article before said article has cooled down to a temperature below 35° C.
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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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |