US4283474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oleophilic resin encapsulates photoconductive zinc oxide particles dispersed in vinyl chloride and vinyl acetate resin binder for electrophotosensitive recording layer
Assignee: Konica Minolta Inc
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Filing: 1980-09-19
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Granted: 1981-08-11
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Expires: 2000-09-19
Abstract
Abstract An electrophotographic element having a conductive support upon which a coating of oleophilic resin-encapsulated zinc oxide particles, and a sensitizer dispersed in a binder containing vinyl chloride and vinyl acetate polymers is disclosed. Capsule wall can be 5A to 1μ thick. The oleophilic resin can be silicone, urethane, epoxy.
Inventors
- 👤 Tadashi Kaneko
- 👤 Takeo Shimura
- 👤 Masanori Matsumoto
- 👤 Hiroyuki Moriguchi
- 👤 Hiroyuki Nomori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:29
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/087
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A photosensitive element for electrophotography which comprises on a conductive support a photoconductive layer comprising photoconductive zinc oxide particles the surface of which particles has been encapsulated, together with a sensitizer for said zinc oxide, with an oleophilic resin material, said encapsulated zinc oxide particles having been dispersed in a binder resin containing vinyl chloride and vinyl acetate as components thereof.
Claim 2
Dependent Claim
61 words
A photosensitive element for electrophotography which comprises on a conductive support a photoconductive layer comprising photoconductive zinc oxide particles the surface of which particles has been encapsulated, together with a sensitizer for said zinc oxide, with an oleophilic resin material, said encapsulated zinc oxide particles having been dispersed in a binder resin containing vinyl chloride and vinyl acetate as components thereof.
Claim 3
Dependent Claim
28 words
A photosensitive element according to claim 1, wherein said binder resin contains as a main ingredient vinyl chloridevinyl acetate copolymer or vinyl chloride-vinyl acetate maleic acid unhydride copolymer.
Claim 4
Dependent Claim
20 words
A photosensitive element according to claim 1 or 2, wherein said oleophilic resin material has a three dimensional reticular structure.
Claim 5
Dependent Claim
25 words
A photosensitive element according to claim 3, wherein said oleophilic resin material has as capsule wall membrane a thickness of 5 angstroms to 1 micron.
Claim 6
Dependent Claim
24 words
A photosensitive element according to claim 3, wherein said oleophilic resin material has as capsule wall membrane a thickness of 20 to 100 angstroms.
Claim 7
Dependent Claim
31 words
A photosensitive element according to claim 1 wherein said oleophilic resin material is one selected from the group consisting of silicone resin, urethane resin, silicone modified urethane resin and epoxy resin.
Claim 8
Dependent Claim
14 words
A photosensitive element according to claim 1 wherein said sensitizer is free acid Rosebengal.
References Cited (Backward Citations)
US3704122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |