Patent US3552958A successfully refreshed from Google Patents.
US3552958A
Expired / Lapsed
US
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Electrophotographic composition and element
Assignee: Eastman Kodak Co
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Filing: 1968-07-17
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Granted: 1971-01-05
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Expires: 1988-07-17
Abstract
Abstract ARYL AND HETEROCYCLIC-SUBSTITUTED CYCLOPROPENYLIUM SALTS ARE SENSITIZERS FOR ORGANIC PHOTOCONDUCTORS.
Inventors
- 👤 Edward J Seus
- 👤 George A Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:21
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0605; G03G5/0607; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06147; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0629; G03G5/0635; G03G5/0637; G03G5/0644; G03G5/0661
Claims Analysis
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |