US4026703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-layered photoreceptor use in electrophotography
Assignee: Panasonic Holdings Corp
•
Filing: 1975-03-26
•
Granted: 1977-05-31
•
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 18:54
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)
US3037861A
Cited
JPS4316198Y1
Cited
US3484237A
Cited
US3725058A
Cited
US3801368A
Cited
US3771866A
Cited
US3850629A
Cited
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 |