US3867142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive materials for producing printing plates
Assignee: Krause Offset System KG
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Filing: 1973-04-16
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Granted: 1975-02-18
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Expires: 1993-04-16
Abstract
Abstract A photosensitive coating composition that is suitable for use in the production of printing plates which consists essentially of a solution in an organic solvent of a polymer of an aldolcondensation product of terephthalaldehyde and diacetone alcohol having a molecular weight between 5000 and 15,000.
Inventors
- 👤 Willy Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:59
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
A SUPPORTED PHOTOSENSITIVE FILM WHICH CONSISTS ESSENTIALLY OF A POLYMER OF AN ALDOL-CONDENSATION PRODUCT OF TEREPHTHALALDEHYDE AND DIACETONE ALCOHOL HAVING A MOLECULAR WEIGHT BETWEEN 5000 AND 15,000 AND A SENSITIZER THEREFOR.
Claim 2
Dependent Claim
31 words
A SUPPORTED PHOTOSENSITIVE FILM WHICH CONSISTS ESSENTIALLY OF A POLYMER OF AN ALDOL-CONDENSATION PRODUCT OF TEREPHTHALALDEHYDE AND DIACETONE ALCOHOL HAVING A MOLECULAR WEIGHT BETWEEN 5000 AND 15,000 AND A SENSITIZER THEREFOR.
Claim 3
Dependent Claim
51 words
A coating composition for the production of a supported photosensitive film as defined in claim 1 which consists essentially of a solution in an organic solvent of a polymer of an aldol-condensation product of terephthalaldehyde and diacetone alcohol having a molecular weight between 5000 and 15,000 together with a sensitizer therefor.
Claim 4
Dependent Claim
17 words
A coating composition as defined in claim 2 in which the sensitizer is Alpha , Alpha ''-azobis(isobutyronitrile).
Claim 5
Dependent Claim
20 words
A coating composition as defined in claim 2 in which the organic solvent is a mixture of cyclohexanone and N,N-dimethylformamide.
Claim 6
Dependent Claim
17 words
A coating composition as defined in claim 2 which also includes a dyestuff or pigment or both.
Claim 7
Dependent Claim
89 words
A PROCESS FOR THE PRODUCTION OF A PRINTABLE IMAGE ON A PRINTING PLATE COATED WITH A FILM OF THE PHOTOSENSITIVE FILMFORMING SUBSTANCE DEFINED IN CLAIM 2, WHICH COMPRISES EXPOSING TO LIGHT THE FILM ON THE PLATE TO PRODUCE A LATENT IMAGE THEREIN, AND THEREAFTER DEVELOPING THE EXPOSED FILM BY TREATING IT WITH A LIQUID CONTAINING N,N-DIMETHYLFORMAMIDE OR OTHER DIALKYL-SUBSTITUTED ACID AMIDE OR A LOW-MOLECULAR-WEIGHT ALIPHATIC ACID AND SUBSEQUENTLY TREATING THE FILM WITH A NATURAL OR SYNTHETIC COLLOID, OR PHOSPHORIC ACID OR A PHOSPHATE, OR BOTH, TO INCREASE ITS WATER-ABSORBABILITY.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |