US3704122A
Expired / Lapsed
US
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Electrophotographic plate comprising a photoconductor dispersed in a resin binder
Assignee: Ricoh Co Ltd
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Filing: 1971-06-10
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Granted: 1972-11-28
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Expires: 1991-06-10
Abstract
Abstract AN ELECTROPHOTOGRAPHIC COPY MATERIAL COMPRISING A SUPPORT AND A LIGHT-SENSITIVE OR PHOTOCONDUCTIVE LAYER FORMED ON ONE SURFACE OF SAID SUPPORT BY A RESINOUS BINDER, WHEREIN SAID PHOTOCONDUCTIVE LAYER CONTAINS A PHOTOCONDUCTIVE SUBSTANCE AND IS FORMED BY A SERIES OF STEPS OF (1) DISPERSING SAID PHOTOCONDUCTIVE SUBSTANCE IN AN AQUEOUS EMULSION PREPARED BY EMULSIFYING A SYNTHETIC FILM-FORMING RESIN OR A NATURAL FILM-FORMING RESIN IN AN AQUEOUS EMULSIFIER SOLUTION CONTAINING A VOLATILE BASIC COMPOUND AND AN ACIDIC COMPOUND THEREAFTER (2) COATING THE RESULTANT EMULSION CONTAINING DESPERSED PHOTOCONDUCTIVE SUBSTANCE ON SAID SUPPORT, AND THEN DRYING THE COATED SUPPORT.
Inventors
- 👤 Nario Yamaguchi
- 👤 Sakae Shimizu
- 👤 Kazuo Tubuko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:24
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/051; G03G5/0521; G03G5/0514; G03G5/0517; G03G5/0528; G03G5/0596
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |