US3635720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive film element comprising a polyester of a polyhydric alcohol and {62 -substituted-{60 -cyanacrylic acid
Assignee: Kalle GmbH and Co KG
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Filing: 1969-03-19
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Granted: 1972-01-18
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Expires: 1989-03-19
Abstract
Abstract Manufacture of a light-sensitive layer of polymers capable of being cross-linked under the action of light. Polymers of this type are esterification products of polyhydric alcohols with unsaturated carboxylic acids having at least one carbon-carbon double bond conjugated with the carboxyl group. The lightsensitive layer is especially suitable for the manufacture of printing plates and etch resists.
Inventors
- 👤 Hartmut Steppan
- 👤 Albrecht Moschel
- 👤 Walter Luders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:05
CPC Classifications
C; C07; C07C; C07C255/00; C08; C08F; C08F8/00; C08F8/14; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/109
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A layer as defined in claim 1 and wherein the ester is a photo-cross-linkable ester of an unsubstituted or a nuclear-substituted benzylidene- Alpha -cyanacetic or a photo-cross-linkable ester of a cinnamylidene- Alpha -cyanacetic acid and a polyfunctional hydroxyl compound.
Claim 2
Dependent Claim
19 words
A layer as defined in claim 10 wherein the photo-cross-linkable ester is derived from an acid of the formula
Claim 3
Dependent Claim
19 words
A layer as defined in claim 1 and wherein a polyvinyl alcohol is used as a polyfunctional hydroxyl compound.
Claim 4
Dependent Claim
51 words
A layer as defined in claim 4 and wherein the polyvinyl alcohol has a degree of saponification from 45 to 99 percent, has a 4 percent strength by weight in solution in water or in a water/methanol mixture (weight ratio 1:1) and has a viscosity of 2 to 25 cp./20* C.
Claim 5
Dependent Claim
21 words
A layer as defined in claim 1 wherein poly(vinyl alcohol/vinyl ester) or poly(vinyl alcohol/ethylene is used as a polyfunctional hydroxyl compound.
Claim 6
Dependent Claim
18 words
A layer as defined in claim 1 and wherein a polyfunctional aliphatic-aromatic ether-alcohol is the polyfunctional hydroxyl compound.
Claim 7
Dependent Claim
19 words
A layer as defined in claim 1 and wherein cellulose or partially acylated cellulose is the polyfunctional hydroxyl compound.
Claim 8
Dependent Claim
24 words
A layer as defined in claim 1 and wherein a condensation product of bisphenol A and epichlorhydrin is used as the polyfunctional hydroxyl compound.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |