Patent US3567438A successfully refreshed from Google Patents.
US3567438A
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US
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Organic photoconductors sensitized with pyrylium cyanine dyes
Assignee: Eastman Kodak Co
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Filing: 1968-03-25
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Granted: 1971-03-02
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Expires: 1988-03-25
Abstract
Abstract PYRYLIUM DYES ARE PROVIDED WHICH FEATURE A 2-ARYLINDOLE NUCLEUS, A CARBAZOLE NUCLEUS, OR AN IMIDAZO (4,5B)-QUINOXALINE NUCLEUS. ORGANIC PHOTOCONDUCTORS ARE SENSTITIZED WITH THE NOVEL DYES OF THIS INVENTION.
Inventors
- 👤 Leslie G S Brooker
- 👤 Donald W Heseltine
- 👤 Daniel S Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:22
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; C09B23/105; C09B23/02; C09B23/04; C09B23/06; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |