Patent US3874942A successfully refreshed from Google Patents.
US3874942A
Expired / Lapsed
US
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Electrophotographic photosensitive member
Assignee: Canon Inc
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Filing: 1972-09-27
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Granted: 1975-04-01
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Expires: 1992-09-27
Abstract
Abstract An electrophotographic photosensitive member has an inorganic insulating layer laminated on the photoconductive layer thereof. This electrophotographic photosensitive member shows high dielectric strength and no deterioration against repeated use over a long period of time.
Inventors
- 👤 Hirokazu Negishi
- 👤 Takashi Saito
- 👤 Takao Komiya
- 👤 Tatsuo Masaki
- 👤 Takashi Ihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:29
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14704; G03G5/14708; G03G5/14713; G03G5/14717; G03G5/14721; G03G5/14726; G03G5/14747; G03G5/14752; G03G5/14782
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
AN ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER COMPRISING A BASE, A PHOTOCONDUCTIVE LAYER AND A SEPARATE INSULATING LAYER ON THE PHOTOCONDUCTIVE LAYER AT LEAST SUBSTANTIALLY TRANSPARENT TO ACTINIC RADIATION AND COMPOSED OF A LAMINATE OF AN INORGANIC INSULATING LAYER COMPOSED OF INORGANIC INSULATING MATERIAL HAVING A DIELECTRIC CONSTANT OF AT LEAST 2 AND AN ORGANIC INSULATING MATERIAL HAVING AN INSULATIVE RESISTANCE OF AT LEAST 10**12 OHM-CM, SAID LAMINATE HAVING A THICKNESS OF 1 TO 40 MICRONS.
Claim 2
Dependent Claim
73 words
AN ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER COMPRISING A BASE, A PHOTOCONDUCTIVE LAYER AND A SEPARATE INSULATING LAYER ON THE PHOTOCONDUCTIVE LAYER AT LEAST SUBSTANTIALLY TRANSPARENT TO ACTINIC RADIATION AND COMPOSED OF A LAMINATE OF AN INORGANIC INSULATING LAYER COMPOSED OF INORGANIC INSULATING MATERIAL HAVING A DIELECTRIC CONSTANT OF AT LEAST 2 AND AN ORGANIC INSULATING MATERIAL HAVING AN INSULATIVE RESISTANCE OF AT LEAST 10**12 OHM-CM, SAID LAMINATE HAVING A THICKNESS OF 1 TO 40 MICRONS.
Claim 3
Dependent Claim
20 words
An electrophotographic photosensitive member as set forth in claim 1, in which the base is composed of a conductive substance.
Claim 4
Dependent Claim
36 words
An electrophotographic photosensitive member as set forth in claim 1, in which the base is a laminate of a conductive substance and an insulating substance and the conductive substance is in contact with the photoconductive layer.
Claim 5
Dependent Claim
36 words
An electrophotographic photosensitive member as set forth in claim 1, in which the base is a laminate of a conductive substance and an insulating substance and the insulating subStance is in contact with the photoconductive layer.
Claim 6
Dependent Claim
20 words
An electrophotographic photosensitive member as set forth in claim 1, in which the base is composed of an insulating substance.
References Cited (Backward Citations)
US2886434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |