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Patent US3501293A successfully refreshed from Google Patents.
US3501293A
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Photoconductive benzobisthiazoles and their use in electrophotographic processes
Assignee: International Business Machines Corp
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Filing: 1967-09-18
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Granted: 1970-03-17
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Expires: 1987-09-18
Abstract
No abstract record available.
Inventors
- 👤 Nicholas J Clecak
- 👤 Robert J Cox
- 👤 Samuel L Solar
- 👤 Herbert K Wurster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:23
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/065; G03G5/0664; G03G5/0666; G03G5/0672; G03G5/0674
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |