US4601965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive material for use in electrophotography
Assignee: Ricoh Co Ltd
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Filing: 1983-01-14
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Granted: 1986-07-22
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Expires: 2003-01-14
Abstract
Abstract A photosensitive material for use in electrophotography having a chargeability improved by incorporating 1 to 500 ppm As oxide in a Se-As (As: 20 to 40% by weight) system photosensitive layer.
Inventors
- 👤 Yukio Ide
- 👤 Seiichi Ohseto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:24
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
A photosensitive material for use in electrophotography, which comprises a Se-As photosensitive layer containing from 20 to 40% by weight of As, said photosensitive layer having incorporated therein from 1 to 500 ppm of As oxide.
Claim 2
Dependent Claim
36 words
A photosensitive material for use in electrophotography, which comprises a Se-As photosensitive layer containing from 20 to 40% by weight of As, said photosensitive layer having incorporated therein from 1 to 500 ppm of As oxide.
Claim 3
Dependent Claim
22 words
A photosensitive material according to claim 1 wherein the content of As oxide is in the range of 1 to 200 ppm.
Claim 4
Dependent Claim
17 words
A photosensitive material according to claim 1 wherein the As oxide is As 2 O 3 .
References Cited (Backward Citations)
US3077386A
Cited
US3685989A
Cited
SU619026A1
Cited
JPS549931A
Cited
JPS5745551A
Cited
US4370399A
Cited
US4518671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |