US3766237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocyanation of olefins
Assignee: EIDP Inc
•
Filing: 1972-01-25
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Granted: 1973-10-16
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Expires: 1992-01-25
Abstract
Abstract A PROCESS FOR THE HYDROCYANATION OF SELECTED UNSATURATED COMPOUDS UTILIZING A NICKEL COMPLEX CATALYST IN THE PRESENCE OF AN EXCESS OF A TRIARYL PHOSPHITE.
Inventors
- 👤 E Squire
- 👤 Y Chia
- 👤 W Drinkard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:25
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/04; C07C; C07C253/00; C07C253/08; C07C253/10
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |