US3242857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for deleting lithographic images
Assignee: Eastman Kodak Co
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Filing: 1963-07-31
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Granted: 1966-03-29
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Expires: 1983-07-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Gale F Nadeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:16
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR RENDERING HYDROPHILIC AN IMAGE AREA ON A LITHOGRAPHIC PRINTING PLATE COMPRISING A SUPPORT HAVING THEREON A TOP LAYER COMPRISING GELATIN HAVING A HARDNESS EQUIVALENT TO THAT OF A GELATIN LAYER CONTAINING FROM 2 GRAMS TO ABOUT 15 GRAMS OF DRY FORMALDEHYDE PER POUND OF GELATIN AND CONTAINING IN THE GELATIN LAYER AN OLEOPHILIC TANNED GELATIN SILVER IMAGE AREA, OBTAINED BY DEVELOPING AN EXPOSED SILVER HALIDE EMULSION WITH A POLYHYDROXY BENZENE SILVER HALIDE DEVELOPING AGENT, COMPRISING FORMING A SILVER SALT BY IMBIBING INTO THE IMAGE AREA TO BE RENDERED HYDROPHILIC AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF IONS SELECTED FROM THE CLASS CONSISTING OF FERRICYANIDE AND FERROCYANIDE.
Claim 2
Dependent Claim
108 words
A PROCESS FOR RENDERING HYDROPHILIC AN IMAGE AREA ON A LITHOGRAPHIC PRINTING PLATE COMPRISING A SUPPORT HAVING THEREON A TOP LAYER COMPRISING GELATIN HAVING A HARDNESS EQUIVALENT TO THAT OF A GELATIN LAYER CONTAINING FROM 2 GRAMS TO ABOUT 15 GRAMS OF DRY FORMALDEHYDE PER POUND OF GELATIN AND CONTAINING IN THE GELATIN LAYER AN OLEOPHILIC TANNED GELATIN SILVER IMAGE AREA, OBTAINED BY DEVELOPING AN EXPOSED SILVER HALIDE EMULSION WITH A POLYHYDROXY BENZENE SILVER HALIDE DEVELOPING AGENT, COMPRISING FORMING A SILVER SALT BY IMBIBING INTO THE IMAGE AREA TO BE RENDERED HYDROPHILIC AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF IONS SELECTED FROM THE CLASS CONSISTING OF FERRICYANIDE AND FERROCYANIDE.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |