Patent US3776754A successfully refreshed from Google Patents.
US3776754A
Expired / Lapsed
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Production of luminescent screens
Assignee: GAF Corp
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Filing: 1971-07-22
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Granted: 1973-12-04
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Expires: 1991-07-22
Abstract
Abstract Process for the production of luminescent screens for color television tubes, the improvement comprising the use of lightinsensitive ethylenically unsaturated vinyl compounds as the binder material, said compounds being capable of undergoing a hardening action when subjected to corpuscular radiation.
Inventors
- 👤 S Levinos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:27
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/04; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/22; H01J29/225; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2275; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A process according to claim 1 wherein said organic binder material comprises a copolymer of maleic anhydride and an alkyl vinyl ether wherein said alkyl moiety contains from one to about 20 carbon atoms and has a specific viscosity ranging from about .05 to about 5.0 measured at 25*C as a one percent solution in methyl ethyl ketone.
Claim 2
Dependent Claim
15 words
A process according to claim 2 wherein said alkyl vinyl ether comprises methyl vinyl ether.
Claim 3
Dependent Claim
48 words
A process according to claim 2 wherein said maleic anhydride/methyl vinyl ether copolymer contains from about 10 percent to about 65 percent on a mole basis of maleic anhydride and has a specific viscosity of 2.0 measured at 25* as a one percent solution in methyl ethyl ketones.
Claim 4
Dependent Claim
14 words
A process according to claim 1 wherein said water contains a surface active agent.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |