Patent US3705031A successfully refreshed from Google Patents.
US3705031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorine and bromine containing poly-9-vinylcarbazole electrophotographic polymers
Assignee: Canon Inc
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Filing: 1970-07-15
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Granted: 1972-12-05
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Expires: 1990-07-15
Abstract
Abstract AN ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MATERIAL COMPRISES A POLYMER CONTAINING A CHLORINE AND BROMINE SUBSTITUTED 9-VINYLCARBAZOLE UNIT.
Inventors
- 👤 Kikuo Kinjo
- 👤 Teruo Yamanouchi
- 👤 Eiichi Kondo
- 👤 Hiroshi Matsuno
- 👤 Katsuhiko Nishide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:27
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; G03G5/072; G03G5/073; C; C08; C08F; C08F26/00; C08F26/06; C08F26/12; C08F8/00; C08F8/18; C08F8/20
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |