US3796572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic light-sensitive material
Assignee: Ricoh Co Ltd
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Filing: 1972-12-07
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Granted: 1974-03-12
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Expires: 1992-12-07
Abstract
Abstract AN ELECTROPHOTOGRAPHIC LIGHT-SENSITIVE MATERIAL HAVING A PHOTOCONDUCTIVE LAYER FORMED ON AN ELECTROCONDUCTIVE SUPPORT, THE PHOTOCONDUCTIVE LAYER COMPRISING AN ORGANIC PHOTOCONDUCTIVE POLYMER SENSITIZED WITH A 2-AZA-9-FLUORENONE DERIVATIVE.
Inventors
- 👤 M Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:07
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0637
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |