Patent US3146104A successfully refreshed from Google Patents.
US3146104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide sensitized lithographic printing plate
Assignee: Eastman Kodak Co
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Filing: 1959-12-21
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Granted: 1964-08-25
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Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Edward C Yackel
- 👤 Thomas I Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:56
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A LITHOGRAPHIC PRINTING PROCESS WHICH COMPRISES (A) EXPOSING TO A SUBJECT A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A GELATIN LAYER CONTAINING A SUFFICIENT AMOUNT OF A POLYHYDROXYBENZENE SILVER HALIDE DEVELOPING AGENT TO DEVELOP THE EXPOSED SILVER HALIDE IN THE LIGHT-SENSITIVE LAYER ABOVE IT, SAID AGENT SELECTED FROM THE CLASS CONSISTING OF HALOGEN SUBSTITUTED, PHENYL SUBSTITUTED, AND 2-6 CARBON ATOMS CONTAINING ALKYL SUBSTITUTED POLYHYDROXYBENZENE DEVELOPING AGENTS, THE OXIDATION PRODUCT OF WHICH RENDERS GELATIN OLEOPHILIC AND OVER SAID GELATIN LAYER AN UNFOGGED GELATINO-SILVER HALIDE EMULSION LAYER UNIFORMLY HARDENED WITH A HARDENER, SUCH THAT THE GELATIN HAS A HARDNESS EQUIVALENT TO THAT OF A GELATIN LAYER HARDENED WITH ABOUT 2 GRAMS TO ABOUT 15 GRAMS OF DRY FORMALDEHYDE PER POUND OF GELATIN, AND
Claim 2
Dependent Claim
122 words
A LITHOGRAPHIC PRINTING PROCESS WHICH COMPRISES (A) EXPOSING TO A SUBJECT A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A GELATIN LAYER CONTAINING A SUFFICIENT AMOUNT OF A POLYHYDROXYBENZENE SILVER HALIDE DEVELOPING AGENT TO DEVELOP THE EXPOSED SILVER HALIDE IN THE LIGHT-SENSITIVE LAYER ABOVE IT, SAID AGENT SELECTED FROM THE CLASS CONSISTING OF HALOGEN SUBSTITUTED, PHENYL SUBSTITUTED, AND 2-6 CARBON ATOMS CONTAINING ALKYL SUBSTITUTED POLYHYDROXYBENZENE DEVELOPING AGENTS, THE OXIDATION PRODUCT OF WHICH RENDERS GELATIN OLEOPHILIC AND OVER SAID GELATIN LAYER AN UNFOGGED GELATINO-SILVER HALIDE EMULSION LAYER UNIFORMLY HARDENED WITH A HARDENER, SUCH THAT THE GELATIN HAS A HARDNESS EQUIVALENT TO THAT OF A GELATIN LAYER HARDENED WITH ABOUT 2 GRAMS TO ABOUT 15 GRAMS OF DRY FORMALDEHYDE PER POUND OF GELATIN, AND
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |