US3867140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic photoconductor-(mononitro-2-aza-fluorenylidene)malononitrile charge transfer complex
Assignee: Ricoh Co Ltd
•
Filing: 1973-01-24
•
Granted: 1975-02-18
•
Expires: 1993-01-24
Abstract
Abstract Photosensitive material for use in electrophotography which is a charge transfer complex comprising (mononitro-2-aza-9fluorenylidene) malononitrile and an organic photoconductor.
Inventors
- 👤 Mitsuru Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:11
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0637
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PHOTOSENSITIVE MATERIAL FOR USE IN ELECTROPHOTOGRAPHY WHICH IS A CHARGE TRANSFER COMPLEX COMPRISING 100 PARTS BY WEIGHT OF AN ORGANIC PHOTOCONDUCTOR AND 1 TO 150 PARTS BY WEIGHT OF (MONONITRO-2-AZA-9-FLUORENYLIDENE) MALONONITRILE.
Claim 2
Dependent Claim
32 words
A PHOTOSENSITIVE MATERIAL FOR USE IN ELECTROPHOTOGRAPHY WHICH IS A CHARGE TRANSFER COMPLEX COMPRISING 100 PARTS BY WEIGHT OF AN ORGANIC PHOTOCONDUCTOR AND 1 TO 150 PARTS BY WEIGHT OF (MONONITRO-2-AZA-9-FLUORENYLIDENE) MALONONITRILE.
References Cited (Backward Citations)
US2980535A
Cited
US3252794A
Cited
US3244516A
Cited
US3307940A
Cited
US3301676A
Cited
US3485625A
Cited
US3484237A
Cited
US3595648A
Cited
US3583869A
Cited
US3752668A
Cited
US3556785A
Cited
US3677752A
Cited
US3674473A
Cited
US3796572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |