Patent US2782218A successfully refreshed from Google Patents.
US2782218A
Expired / Lapsed
US
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1-fluoro-1, 2-dicyano-2-hydrocarbon substituted ethylenes, and their preparation from the corresponding 1, 1-difluoro-2-cyanoethylenes and alkali cyanides
Assignee: EIDP Inc
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Filing: 1955-05-06
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Granted: 1957-02-19
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Expires: 1975-05-06
Abstract
No abstract record available.
Inventors
- 👤 Drysdale John Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:05
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/01; C07C255/10; C07C253/00; C07C253/14; C07C253/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
A FLUORODINITRILE OF THE FORMULA
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) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |