Patent US3682629A successfully refreshed from Google Patents.
US3682629A
Expired / Lapsed
US
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Electrophotographic recording paper for use in the preparation of a planographic plate
Assignee: Ricoh Co Ltd
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Filing: 1970-08-31
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Granted: 1972-08-08
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Expires: 1990-08-31
Abstract
Abstract THIS INVENTION RELATES TO AN ARTICLE OF MANUFACTURE, A NOVEL ELECTROPHOTOGRAPHIC SHEET MATERIAL ADAPTED FOR USE IN THE PREPARATION OF A PLANOGRAPHIC PLATE, COMPRISING A SUPPORT SHEET AND A LAYER OR SHEET OF PHOTOCONDUCTIVE MATERIAL SUPPORTED THEREBY, THE TWO MATERIALS HAVING AN INTERMEDIATE LAYER OR SHEET POSITIONED BETWEEN THEM COMPRISING A WATER- AND ALCOHOL-SOLUBLE RESIN AND WHICH HAS THE ADDITIONAL PROPERTY OF BECOMING COAGULATED OR FLOCCULATED AND RENDERED WATER-INSOLUBLE UPON CONTACT WITH AN ACID SOLUTION CONTAINING METAL IONS HAVING A VALENCE OF 2 OR MORE.
Inventors
- 👤 Sakae Shimizu
- 👤 Tsuguo Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:49
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/28; G03G5/00; G03G5/14; G03G5/142
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |