US3635981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectrophoretic imaging pigment composition and process
Assignee: Xerox Corp
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Filing: 1968-11-01
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Granted: 1972-01-18
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Expires: 1988-11-01
Abstract
Abstract 2,9-DI(R-),3,10-BIS((2-R''-PHENYL)-CO-NH-CH2-),7,14-DI(O=)- A NOVEL COMPOSITION HAVING THE FORMULA: 2,9-DI(R-),3,10-BIS((2-R''-PHENYL)-CO-NH-CH2-),7,14-DI(O=)5,7,12,14 -TETRAHYDROQUINO(2,3-B)ACRIDINE WHEREIN R=CH3, C2H5, OCH3, OC2H5 OR A HAOLGEN AND WHEREIN R''=COOH, COOCA/2, SO3H, OR SO3CA/2 IS DISCLOSED. METHODS OF PREPARING SAID COMPOSITION AND OF USING SAID COMPOSITION IN ELECTROPHORETIC IMAGING PROCESSES ARE ALSO DISCLOSED. D R A W I N G
Inventors
- 👤 Lester Weinberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:05
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04; C; C09; C09B; C09B48/00; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/0653
Claims Analysis
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |