Patent US3723116A successfully refreshed from Google Patents.
US3723116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive materials
Assignee: Canon Inc
•
Filing: 1971-07-20
•
Granted: 1973-03-27
•
Expires: 1991-07-20
Abstract
Abstract A PHOTOSENSITIVE MATERIAL COMPRISES A POLY-9-VINYLCARBAZOLE OR ITS DERIVATIVE AND A CYANINE DYE. THE CYANINE DYE SENSITIZES THE PHOTOSENSITIVITY OF POLY-9-VINYLCARBAZOLE OR ITS DERIVATIVE AND THEREBY THE PHOTOSENSITIVE MATERIAL IS SUITABLE FOR ELECTROPHOTOGRAPHY.
Inventors
- 👤 K Kinjo
- 👤 T Yamanouchi
- 👤 E Kondo
- 👤 Y Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:11
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; G03G5/072; G03G5/073; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |