US3421891A
Expired / Lapsed
US
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Electrophotographic materials comprising brominated poly-n-vinyl carbazoles
Assignee: Panasonic Holdings Corp
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Filing: 1965-06-14
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Granted: 1969-01-14
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Akira Inami
- 👤 Kazuhisa Morimoto
- 👤 Yoshinobu Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:54
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; G03G5/072; G03G5/073; C; C07; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/88; C08; C08F; C08F26/00; C08F26/06; C08F26/12; C08F8/00; C08F8/18; C08F8/20
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |