US4026703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-layered photoreceptor use in electrophotography
Assignee: Panasonic Holdings Corp
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Filing: 1975-03-26
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Granted: 1977-05-31
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Expires: 1995-03-26
Abstract
Abstract An electrophotographic photoreceptor for producing an electrostatic latent image on the top layer thereof which comprises from the bottom up:
Inventors
- 👤 Yoshiki Hayashi
- 👤 Masanaru Hasegawa
- 👤 Takeo Fusayama
- 👤 Kazuhiko Kosuge
- 👤 Kenji Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/102; G03G5/02; G03G5/04; G03G5/043; G03G5/0436
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
An electrophotographic photoreceptor thereof producing an electrostatic latent image on the top layer therof which comprises from the bottom up: (a) a substrate (b) a layer of metallic palladium having a thickness of from 5 A to 1000 A, (c) a layer including vitreous selenium having a thickness of from 0.05 to 3 microns and (d) a top layer including polyvinyl carbazole having a recurring unit of the formula: ##STR3## wherein X is a member selected from a group consisting of hydrogen, halogen, nitro, alkyl, aryl, alkyl aryl, amino and alkylamino.
Claim 2
Dependent Claim
91 words
An electrophotographic photoreceptor thereof producing an electrostatic latent image on the top layer therof which comprises from the bottom up: (a) a substrate (b) a layer of metallic palladium having a thickness of from 5 A to 1000 A, (c) a layer including vitreous selenium having a thickness of from 0.05 to 3 microns and (d) a top layer including polyvinyl carbazole having a recurring unit of the formula: ##STR3## wherein X is a member selected from a group consisting of hydrogen, halogen, nitro, alkyl, aryl, alkyl aryl, amino and alkylamino.
Claim 3
Dependent Claim
20 words
An electrophotographic photoreceptor according to claim 1, wherein said palladium layer is deposited onto said substrate from a vapor thereof.
Claim 4
Dependent Claim
17 words
An electrophotographic photoreceptor according to claim 1, wherein said palladium layer is made by the sputtering process.
Claim 5
Dependent Claim
21 words
An electrophotographic photoreceptor according to claim 1, wherein said palladium layer has a thickness of from 10 A to 100 A.
Claim 6
Dependent Claim
46 words
An electrophotographic photoreceptor according to claim 1, wherein said substrate is a plastic film of a member selected from a group consisting of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyamide, polyimide-amide, cellulose acetate, polystyrene, polypropylene, polyethylene, polyvinyl chloride, acrylonitrile-butadiene-styrene(ABS), acrylonitrile-styrene(AS), polyacetal, epoxy, urethane, and heat-curing polyester.
Claim 7
Dependent Claim
75 words
An electrophotographic photoreceptor according to claim 1, wherein: said substrate is a plastic film of a member selected from a group consisting of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyamide, polyimide-amide, cellulose acetate, polystyrene, polypropylene, polyethylene, polyvinyl chloride, acrylonitrile-butadiene-styrene (ABS), acrylonitrile-styrene(AS), polyacetal, epoxy, urethane and heat-curing polyester, and said palladium layer having a thickness of from 10 A to 100 A, which is deposited onto said substrate from a vapor thereof by a sputtering process.
Claim 8
Dependent Claim
13 words
An electrophotographic photoreceptor according to claim 1, wherein said substrate is electrically insulating.
Claim 9
Dependent Claim
13 words
An electrophotographic photoreceptor according to claim 1, wherein said substrate is electrically conductive.
References Cited (Backward Citations)
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US3484237A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |