US3926642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymer lithographic plate element
Assignee: Hercules LLC
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Filing: 1974-03-25
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Granted: 1975-12-16
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Expires: 1994-03-25
Abstract
Abstract The invention concerns a process for making photographic images. The process involves the photooxygenation of a film of an extralinearly unsaturated polymer containing allylic hydrogens, followed by treatment of the exposed film with a reactant which will form a graft polymer structure in the exposed areas of the film.
Inventors
- 👤 David S Breslow
- 👤 David A Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:07
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/265; G03F7/004; G03F7/038; G03F7/38; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/124
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
A LITHOGRAPHIC PLATE ELEMENT COMPRISING A SUPPORT AND A LAYER OF A COMPOSITION COMPRISING A PHOTOOXYGENATION SENSITIZER AND A CROSS-LINKED POLYMER CONTAINING EXTRALINEAR OLEFINIC UNSATURATION OF THE TYPE IN WHICH THERE IS NO MORE THAN ONE HYDROGEN ATOM ON EACH OF THE DOUBLE BOND CARBONS AND IN WHICH THERE IS AT LEAST ONE ALLYLIC HYDROGEN ON AT LEAST ONE OF THE CARBONS ADJACENT TO THE DOUBLE BOND CARBONS.
Claim 2
Dependent Claim
68 words
A LITHOGRAPHIC PLATE ELEMENT COMPRISING A SUPPORT AND A LAYER OF A COMPOSITION COMPRISING A PHOTOOXYGENATION SENSITIZER AND A CROSS-LINKED POLYMER CONTAINING EXTRALINEAR OLEFINIC UNSATURATION OF THE TYPE IN WHICH THERE IS NO MORE THAN ONE HYDROGEN ATOM ON EACH OF THE DOUBLE BOND CARBONS AND IN WHICH THERE IS AT LEAST ONE ALLYLIC HYDROGEN ON AT LEAST ONE OF THE CARBONS ADJACENT TO THE DOUBLE BOND CARBONS.
Claim 3
Dependent Claim
26 words
The lithographic plate element of claim 1 wherein the polymer is the product of condensation of 2,3-dimethyl-1,3-butadiene or isoprene with a propoxylated bisphenol-A fumarate polyester resin.
References Cited (Backward Citations)
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Cited
US3703402A
Cited
US3738973A
Cited
US3795640A
Cited
US3790389A
Cited
US3801320A
Cited
US3748131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |