US3834909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing lithoprinting plate
Assignee: Ricoh Co Ltd
•
Filing: 1973-02-07
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Granted: 1974-09-10
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Expires: 1993-02-07
Abstract
Abstract PROCESS FOR PRODUCING A LITHOPRINTING PLATE IN WHICH A LATENT ELECTROSTATIC IMAGE IS PRODUCED ON A PHOTOCONDUCTIVE PLATE ON WHICH THE PHOTOCONDUCTIVE SURFACE LAYER HAS A CONTACT ANGLE WITH WATER OF FROM 135* TO 180* AT 20*C. AND 65% RELATIVE HUMIDITY, DEVELOPING THE IMAGE WITH A LIQUID DEVELOPER, APPLYING AN ELECTRIC CHARGE AND ETCHING.
Inventors
- 👤 F Arai
- 👤 M Shinozaki
- 👤 N Usui
- 👤 T Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:23
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/051; G03G5/0517; G03G5/0514
Claims Analysis
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |