Patent US3541552A successfully refreshed from Google Patents.
US3796569A
Expired / Lapsed
US
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Electrophotographic photosensitive material
Assignee: Canon Inc
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Filing: 1971-11-11
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Granted: 1974-03-12
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Expires: 1991-11-11
Abstract
Abstract AN ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MATERIAL WHICH COMPRISES POLY-9-VINYLCARBAZOLE OR DERIVATIVE THEREOF AND A DIALKYLAMINOSTYRYL DYE.
Inventors
- 👤 E Kondo
- 👤 K Kinjo
- 👤 T Yamanouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:20
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; C08K; C08K5/00; C08K5/0008; C08K5/0041; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
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) | 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 |