Patent US3655723A successfully refreshed from Google Patents.
US3655723A
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Hydrocyanation of olefins
Assignee: EIDP Inc
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Filing: 1969-10-31
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Granted: 1972-04-11
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Expires: 1989-10-31
Abstract
Abstract AN IMPROVED PROCESS FOR HYDROCYANATING AN UNSATURATED ORGANIC COMPOUND HAVING AT LEAST ONE ALIPHATIC CARBONCARBON DOUBLE BOND IN THE PRESENCE OF A COMPLEX OF A METAL SUCH AS NICKEL, COBALT, PALLADIUM, IRON, TUNGSTEN, OR MOLYBDENUM WHEREIN A CYANOHYDRIN IS EMPLOYED AS THE SOURCE OF HYDROGEN CYANIDE.
Inventors
- 👤 William Charles Drinkard Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:54
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; B01J31/2404; B01J31/18; B01J31/1845; B01J31/185; B01J31/20; C; C07; C07C; C07C253/00; C07C253/08; C07C253/10; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/323; B01J2531/00; B01J2531/60; B01J2531/64; B01J2531/66; B01J2531/80; B01J2531/82; B01J2531/824; B01J2531/84; B01J2531/842; B01J2531/845; B01J2531/847; C07C2602/00; C07C2602/36; C07C2602/42
Claims Analysis
Total Claims: 0
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |