Patent US3787235A successfully refreshed from Google Patents.
US3787235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrophotographic sensitive paper
Assignee: Xerox Corp
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Filing: 1972-09-22
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Granted: 1974-01-22
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Expires: 1992-09-22
Abstract
Abstract Electrophotographic paper is provided which comprises a waterproof paper treated with inorganic colloidal oxide dispersion having an electroconductive layer coated on the treated surface and a photoconductive insulating layer residing on the surface of the electroconductive layer.
Inventors
- 👤 S Honjo
- 👤 Y Tamai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:21
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/101; G03G5/104
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
In a process for preparation of an electroconductive paper suitable for use in continuous tone imaging wherein a waterproofed paper substrate is provided having coated on at least one surface thereof an inorganic colloidal oxide resin, the inorganic colloidal oxide being further overcoated with an electroconductive hydrophillic resinous layer, said electroconductive layer being further overcoated with a photoconductive insulating layer, the improvement comprising providing an electrically insulating barrier layer interposed between the photoconductive insulating layer and the electroconductive layer.
References Cited (Backward Citations)
US1230095A
Cited
US2340728A
Cited
US3011918A
Cited
US3493427A
Cited
US3293115A
Cited
US3544318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |