US3672979A
Expired / Lapsed
US
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Method of producing a phthalocyanine photoconductive layer
Assignee: Xerox Corp
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Filing: 1970-01-02
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Granted: 1972-06-27
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Expires: 1990-01-02
Abstract
Abstract A NOVEL PROCESS FOR THE PREPARATION OF A PHOTOCONDUCTIVE LAYER OF AN ELECTROPHOTOGRAPHIC PLATE WHICH COMPRISES COMBINING PHTAHLOCYANNINE PIGMENT PARTICLES AND A BINDER MATERIAL IN A LIQUID MEDIUM AND SANDMILLING AND THE COMBINATION IS DISCLOSED.
Inventors
- 👤 Paul L Gerace
- 👤 Nikolaus E Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:21
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0696
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |