Patent US4070185A successfully refreshed from Google Patents.
US4070185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive material for electrophotography having photosensitive multi-layers
Assignee: Konica Minolta Inc
•
Filing: 1975-11-10
•
Granted: 1978-01-24
•
Expires: 1995-11-10
Abstract
Abstract A photosensitive material for electrophotography which comprises a conductive support and two or more superimposed photosensitive layers where each layer comprises photoconductive power and a binder, the particle size of the photoconductive powder in an upper layer being greater than that in a lower layer. Both high photosensitivity and high resistance to electrical impact are imparted to the photosensitive material.
Inventors
- 👤 Akira Kato
- 👤 Akira Itoh
- 👤 Tohru Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:11
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/087; G03G5/043; G03G5/0433
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A photosensitive article for electrography having a conductive substrate and a coating of a single layer of photosensitive material comprising photoconductive powder and a binder, the particle size of said photoconductive powder adjacent to the surface of the coating in contact with the substrate being smaller than 0.5μ and the particle size of said photoconductive powder adjacent to the outer surface of the article opposite said substrate being at least 0.5μ.
Claim 2
Dependent Claim
71 words
A photosensitive article for electrography having a conductive substrate and a coating of a single layer of photosensitive material comprising photoconductive powder and a binder, the particle size of said photoconductive powder adjacent to the surface of the coating in contact with the substrate being smaller than 0.5μ and the particle size of said photoconductive powder adjacent to the outer surface of the article opposite said substrate being at least 0.5μ.
Claim 3
Dependent Claim
30 words
The photosensitive article of claim 1 wherein said photoconductive powder is a member selected from the group consisting of zinc oxide, zinc sulfide, cadmium sulfide, cadmium selenide and titanium dioxide.
Claim 4
Dependent Claim
31 words
The photosensitive article of claim 1 wherein the particle size of the photoconductive powder adjacent to the outer surface of said coating is in the range of 0.5 to 3 μ.
Claim 5
Dependent Claim
33 words
The photosensitive article of claim 1 wherein said binder is contained in said coating in the range of 5 - 50 parts by weight per 100 parts by weight of said photoconductive powder.
Claim 6
Dependent Claim
17 words
The photosensitive article of claim 1 wherein said coating has a thickness of 5 - 30 μ.
References Cited (Backward Citations)
CA887021A
Cited
US2844734A
Cited
US3077398A
Cited
GB999405A
Cited
US3350610A
Cited
US3391022A
Cited
JPS4412384Y1
Cited
JPS4412388Y1
Cited
US3801317A
Cited
US3679405A
Cited
US3704121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |