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US3658878A
Expired / Lapsed
US
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Ethylenically unsaturated cyano group containing compounds
Assignee: Eastman Kodak Co
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Filing: 1970-01-22
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Granted: 1972-04-25
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Expires: 1990-01-22
Abstract
Abstract A COMPOUND HAVING THE FORMULA: CH2=C(-R4)-COO-R5 WHERE R4 IS HYDROGEN, AN ALKYL GROUP CONTAINING UP TO 12 CARBON ATOMS OR -R6-OOC-CH2-CN WHERE R6 IS AN ALKYLENE GROUP CONTAINING UP TO 10 CARBON ATOMS; AND R5 IS AN ALKYL GROUP CONTAINING UP TO 10 CARBON ATOMS, A CYCLOALKYL GROUP CONTAINING UP TO 10 CARBON ATOMS, A PHENYL GROUP OR -R6-OOC-CH2-CN WHERE R6 IS AN ALKYLENE GROUP CONTAINING UP TO 10 CARBON ATOMS, PROVIDED THAT ONE AND ONLY ONE OF R4 AND R5 IS ALWAYS -R6-OOC-CH2-CN
Inventors
- 👤 Donald Arthur Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:50
CPC Classifications
C; C07; C07C; C07C255/00; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C8/00; G03C8/02
Claims Analysis
Total Claims: 0
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |