US3592647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving planographic offset printing plates
Assignee: EIDP Inc
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Filing: 1967-06-07
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Granted: 1971-07-13
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Expires: 1987-06-07
Abstract
Abstract A PROCESS IF IMAGE REPRODUCTION WHICH COMPRISES: (A) IMAGE-WISE EXPOSING A SILVER HALIDE EMULSION ON A SUPPORT; (B) FORMING A METALLIC SILVER SURFACE IMAGE IN THE UNEXPOSED AREAS BY SILVER TRANSFER DEVELOPMENT; (C) TREATING THE SURFACE OF THE ELEMENT WITH A SOLUTION OF AN ADJUVANT WHICH RENDERS THE UNEXPOSED AREAS MORE OLEOPHOBIC THAN THE EXPOSED AREAS; AND (D) USING THE ELEMENT TO PRINT BY LITHOGRAPHY.
Inventors
- 👤 Ralph Kingsley Blake
- 👤 Michael P Dunkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:43
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |