US3089770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making planographic printing forms using a light sensitive gelatin reception layer
Assignee: Agfa Gevaert NV
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Filing: 1959-08-26
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Granted: 1963-05-14
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Expires: 1979-08-26
Abstract
No abstract record available.
Inventors
- 👤 Gunther Eberhard
- 👤 Lassig Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/063; B; B41; B41N; B41N1/00; B41N1/12; B41N1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A PROCESS FOR PRODUCING PLANOGRAPHIC PRINTING LAYERS FROM A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER BY DEVELOPING THE EXPOSED EMULSION IN CONTACT WITH A LIGHT INSENSITIVE GELATIN RECEPTION LAYER CONTAINING A BINDING AGENT, DISSOLVING SILVER HALIDE FROM THE UNEXPOSED PARTS OF SAID EMULSION LAYER, TRANSFERRING THE UNEXPOSED DISSOLVED SILVER HALIDE TO SAID RECEPTION LAYER, AND REDUCING THE TRANSFERRED SILVER HALIDE TO SILVER, SEPARATING SAID EMULSION LAYER FROM SAID RECEPTION LAYER AND HARDENING SAID RECEPTION LAYER FOR PLANOGRAPHIC PRINTING, THE IMPROVEMENT CONSISTING OF CONTACTING THE GELATIN OF SAID RECEPTION LAYER WITH AN AQUEOUS HYDROFLUOSILICIC ACID SOLUTION HAVING A PH VALVE OF 5 TO 6.5
Claim 2
Dependent Claim
103 words
IN A PROCESS FOR PRODUCING PLANOGRAPHIC PRINTING LAYERS FROM A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER BY DEVELOPING THE EXPOSED EMULSION IN CONTACT WITH A LIGHT INSENSITIVE GELATIN RECEPTION LAYER CONTAINING A BINDING AGENT, DISSOLVING SILVER HALIDE FROM THE UNEXPOSED PARTS OF SAID EMULSION LAYER, TRANSFERRING THE UNEXPOSED DISSOLVED SILVER HALIDE TO SAID RECEPTION LAYER, AND REDUCING THE TRANSFERRED SILVER HALIDE TO SILVER, SEPARATING SAID EMULSION LAYER FROM SAID RECEPTION LAYER AND HARDENING SAID RECEPTION LAYER FOR PLANOGRAPHIC PRINTING, THE IMPROVEMENT CONSISTING OF CONTACTING THE GELATIN OF SAID RECEPTION LAYER WITH AN AQUEOUS HYDROFLUOSILICIC ACID SOLUTION HAVING A PH VALVE OF 5 TO 6.5
References Cited (Backward Citations)
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US2097416A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |