Patent US4281055A successfully refreshed from Google Patents.
US4281055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive element with water soluble interlayer
Assignee: Konica Minolta Inc
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Filing: 1980-02-19
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Granted: 1981-07-28
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Expires: 2000-02-19
Abstract
Abstract Photosensitive element for electrophotography which comprises (a) a photosensitive layer composed of (1) a binder resin and (2) particles of photoconductive material being dispersed in said binder resin and each particle comprising a photoconductive zinc oxide particle having been encapsulated over its surface with an encapsulating resinous material; (b) an electroconductive support for said photosensitive layer; and (c) an intermediate layer being located between said photosensitive layer and said support, and composed of a water-soluble polymer. The water-soluble polymer preferably is a casein, and a sensitizing agent preferably is adsorbed by the surface of the zinc oxide particle and or included in the encapsulating resinous layer.
Inventors
- 👤 Hiroyuki Moriguchi
- 👤 Satoshi Haneda
- 👤 Tadashi Kaneko
- 👤 Akira Itoh
- 👤 Takeo Shimura
- 👤 Masanori Matsumoto
- 👤 Hiroyuki Nomori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:53
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/02; G03G5/04; G03G5/08; G03G5/087; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/101
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A photosensitive element for electrophotography which comprises (a) a photosensitive layer comprising (1) a binder resin and (2) photoconductive zinc oxide particles being dispersed in said binder resin, said photoconductive zinc oxide particles having been encapsulated over its surface with an encapsulating resinous layer; (b) an electroconductive support for said photosensitive layer; and (c) an intermediate layer consisting essentially of a water-soluble polymer and said intermediate layer being located between said photosensitive layer and said support.
Claim 2
Dependent Claim
76 words
A photosensitive element for electrophotography which comprises (a) a photosensitive layer comprising (1) a binder resin and (2) photoconductive zinc oxide particles being dispersed in said binder resin, said photoconductive zinc oxide particles having been encapsulated over its surface with an encapsulating resinous layer; (b) an electroconductive support for said photosensitive layer; and (c) an intermediate layer consisting essentially of a water-soluble polymer and said intermediate layer being located between said photosensitive layer and said support.
Claim 3
Dependent Claim
14 words
A photosensitive element according to claim 1, wherein said water-soluble polymer is a casein.
Claim 4
Dependent Claim
15 words
A photosensitive element according to claim 2, wherein said casein having been treated with ammonia.
Claim 5
Dependent Claim
23 words
A photosensitive element according to claim 1, wherein a sensitizing agent for said zinc oxide having been enclosed by said encapsulating resinous layer.
Claim 6
Dependent Claim
27 words
A photosensitive element according to claim 1, wherein said electroconductive support carries, on the other surface, a resinous layer, at least 60% of said resin being polyethylene.
Claim 7
Dependent Claim
99 words
A photosensitive element for electrophotography which comprises: (a) a photosensitive layer positioned on one side of a support comprising (1) a binder resin and (2) resin encapsulated photoconductive particles, comprising zinc oxide together with a sensitizing agent encapsulated within a resinous surface layer, dispersed in said binder resin; (b) an electroconductive support for said photosensitive layer, carrying, on the other side, a resinous layer, at least 60% of said resin being polyethylene; and (c) an intermediate layer consisting essentially of casein having been treated with ammonia and said intermediate layer being located between said photosensitive layer and said support.
Claim 8
Dependent Claim
99 words
A photosensitive element for electrophotography which comprises: (a) a photosensitive layer positioned on one side of a support comprising (1) a binder resin and (2) resin encapsulated photoconductive particles, comprising zinc oxide together with a sensitizing agent encapsulated within a resinous surface layer, dispersed in said binder resin; (b) an electroconductive support for said photosensitive layer, carrying, on the other side, a resinous layer, at least 60% of said resin being polyethylene; and (c) an intermediate layer consisting essentially of casein having been treated with ammonia and said intermediate layer being located between said photosensitive layer and said support.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |