Patent US2903054A successfully refreshed from Google Patents.
Patent US3833637A successfully refreshed from Google Patents.
US3833637A
Expired / Lapsed
US
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Preparation of unsaturated nitriles
Assignee: Phillips Petroleum Co
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Filing: 1971-11-22
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Granted: 1974-09-03
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Expires: 1991-11-22
Abstract
Abstract CONDENSATION OF ALDEHYDES WITH ALKYL NITRILES OVER A BASIC CATALYST YIELDS ALPHA, BETA-UNSATURATED NITRILES. IN ONE EMBODIMENT, ACETONITRILE REACTED WITH EITHER ACETALDEHYDE OR BENZALDEHYDE IN THE PRESENCE OF A CATALYST COMPRISING A BASIC INORGANIC COMPOUND YIELDED, RESPECTIVELY, CROTONITRILE AND CINNAMONITRILE. THE PRODUCT NITRILES ARE CHEMICAL INTERMEDIATES TO ACIDS, AMIDES OR AMINES.
Inventors
- 👤 R Cobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:53
CPC Classifications
C; C07; C07C; C07C255/00
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |