US3577235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic composition and element
Assignee: Eastman Kodak Co
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Filing: 1969-02-17
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Granted: 1971-05-04
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Expires: 1989-02-17
Abstract
Abstract 4-AMINOBENZO(B)PYRYLIUM AND 4-AMINOBENZO(B)THIAPYRYLIUM SALTS ARE SENSITIZERS FOR ORGANO-METALLIC PHOTOCONDUCTORS. PHOTOCONDUCTIVE COMPOSITIONS SENSITIZED WITH THESE COMPOUNDS HAVE INCREASED ELECTROPHOTOGRAPHIC SPEED AND ARE SENSITIVE IN THE ULTRAVIOLET REGION OF THE SPECTRUM.
Inventors
- 👤 Lawrence E Contois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:41
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/09; G03G5/06
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |