US2635962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimensionally stable cellulose ester lithographic printing plates
Assignee: Eastman Kodak Co
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Filing: 1950-07-12
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Granted: 1953-04-21
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Expires: 1970-07-12
Abstract
No abstract record available.
Inventors
- 👤 Gale F Nadeau
- 👤 Clemens B Starck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:03
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/091; G03F7/038; G03F7/039; G03F7/04; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/16; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING AN ALUMIUM FOIL AND A SHEET OF CELLULOSE ORGANIC ACID ESTER BONDED TOGETHER WITH AN INTERLAYER COMPRISING ESSENTIALLY A RESINOUS COPOLYMER OF VINYL CHLORIDE, VINYL ACETATE AND AN A,B-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID ADHERENT THERETO, THE SAID CELLULOSE ORGANIC ESTER SHEET HAVING A LAYER OF CELLULOSE NITRATE CONTAINING AN ANTIHALATION DYE ON THE INNER SURFACE AND A HYDROLYZED STRATUM ON THE OUTER SURFACE SENSITIZED WITH AN AGENT SELECTED FROM THE CLASS CONSISTING OF OXIDANTS FOR CELLULOSE IN THE PRESENCE OF LIGHT AND LIGHT-REDUCIBLE FERRIC SALTS INCAPABLE OF OXIDATION OF CELLULOSE TO THE ALKALI-SOLUBLE STATE IN THE PRESENCE OF LIGHT, AND THE SAID ALUMINUM FOIL HAVING THE OUTER SURFACE THEREOF COVERED WITH A PROTECTIVE LAYER OF THE SAID RESINOUS COPOLYMER.
Claim 2
Dependent Claim
123 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING AN ALUMIUM FOIL AND A SHEET OF CELLULOSE ORGANIC ACID ESTER BONDED TOGETHER WITH AN INTERLAYER COMPRISING ESSENTIALLY A RESINOUS COPOLYMER OF VINYL CHLORIDE, VINYL ACETATE AND AN A,B-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID ADHERENT THERETO, THE SAID CELLULOSE ORGANIC ESTER SHEET HAVING A LAYER OF CELLULOSE NITRATE CONTAINING AN ANTIHALATION DYE ON THE INNER SURFACE AND A HYDROLYZED STRATUM ON THE OUTER SURFACE SENSITIZED WITH AN AGENT SELECTED FROM THE CLASS CONSISTING OF OXIDANTS FOR CELLULOSE IN THE PRESENCE OF LIGHT AND LIGHT-REDUCIBLE FERRIC SALTS INCAPABLE OF OXIDATION OF CELLULOSE TO THE ALKALI-SOLUBLE STATE IN THE PRESENCE OF LIGHT, AND THE SAID ALUMINUM FOIL HAVING THE OUTER SURFACE THEREOF COVERED WITH A PROTECTIVE LAYER OF THE SAID RESINOUS COPOLYMER.
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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |