Patent US2386402A successfully refreshed from Google Patents.
Patent US3383211A successfully refreshed from Google Patents.
US3383211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic printing plates
Assignee: Gevaert Photo Producten NV
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Filing: 1964-04-20
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Granted: 1968-05-14
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Jan Pieter Poels
- 👤 Gerard Michiel Sevens
- 👤 Louis Maria De Haes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/063; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06; G03F7/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR PRODUCING A LITHOGRAPHIC PRINTING PLATE COMPRISING IMAGE-WISE EXPOSING A LIGHT-SENSITIVE MATERIAL BEARING A SILVER HALIDE EMULSION LAYER AND A SUPERPOSED WATER-PERMEABLE UNHARDENED COLLOID LAYER, BRINGING SAID LIGHT-SENSITIVE MATERIAL IN THE PRESENCE OF DEVELOPER SUBSTANCES A COMPLEXING AGENT FOR SILVER HALIDE, AN ALKALI AND A PROCESSING LIQUID INTO CONTACT WITH A METALLIC LAYER ONTO WHICH SILVER FROM THE NON-EXPOSED, COMPLEXED SILVER HALIDE, WHICH DIFFUSES FROM SAID EMULSION LAYER THROUGH SAID WATER-PERMEABLE COLLOID LAYER, SETTLES BY THE REDUCING ACTION OF THE METALLIC LAYER ITSELF, AND SEPARATING SAID MATERIALS FROM EACH OTHER.
Claim 2
Dependent Claim
92 words
A PROCESS FOR PRODUCING A LITHOGRAPHIC PRINTING PLATE COMPRISING IMAGE-WISE EXPOSING A LIGHT-SENSITIVE MATERIAL BEARING A SILVER HALIDE EMULSION LAYER AND A SUPERPOSED WATER-PERMEABLE UNHARDENED COLLOID LAYER, BRINGING SAID LIGHT-SENSITIVE MATERIAL IN THE PRESENCE OF DEVELOPER SUBSTANCES A COMPLEXING AGENT FOR SILVER HALIDE, AN ALKALI AND A PROCESSING LIQUID INTO CONTACT WITH A METALLIC LAYER ONTO WHICH SILVER FROM THE NON-EXPOSED, COMPLEXED SILVER HALIDE, WHICH DIFFUSES FROM SAID EMULSION LAYER THROUGH SAID WATER-PERMEABLE COLLOID LAYER, SETTLES BY THE REDUCING ACTION OF THE METALLIC LAYER ITSELF, AND SEPARATING SAID MATERIALS FROM EACH OTHER.
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |