US3454398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a lithographic plate by treating silver halide with a terminal ethynyl compound to form an ink receptive image area
Assignee: American Photocopy Equipment Co
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Filing: 1966-08-29
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Granted: 1969-07-08
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Expires: 1986-08-29
Abstract
No abstract record available.
Inventors
- 👤 Otto Bruno Wendt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:52
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOD OF FORMING A LITHOGRAPHIC PRINTING PLATE FROM A SILVER HALIDE PHOTOGRAPHIC ELEMENT HAVING EXPOSED AND UNEXPOSED PORTIONS, WHICH COMPRISES: DEVELOPING SAID ELEMENT TO CONVERT SILVER HALIDE IN SAID EXPOSED PORTIONS TO METALLIC SILVER, AND CONTACTING SAID ELEMENT WITH A TERMINAL ETHYNYL COMPOUND TO CONVERT SILVER HALIDE IN SAID UNEXPOSED PORTIONS TO AN OLEOPHILIC INK-RECEPTIVE MEDIUM.
Claim 2
Independent Claim
57 words
A METHOD OF FORMING A LITHOGRAPHIC PRINTING PLATE FROM A SILVER HALIDE PHOTOGRAPHIC ELEMENT HAVING EXPOSED AND UNEXPOSED PORTIONS, WHICH COMPRISES: DEVELOPING SAID ELEMENT TO CONVERT SILVER HALIDE IN SAID EXPOSED PORTIONS TO METALLIC SILVER, AND CONTACTING SAID ELEMENT WITH A TERMINAL ETHYNYL COMPOUND TO CONVERT SILVER HALIDE IN SAID UNEXPOSED PORTIONS TO AN OLEOPHILIC INK-RECEPTIVE MEDIUM.
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |