US3565954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing primary amines
Assignee: Melle Bezons SA
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Filing: 1968-02-28
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Granted: 1971-02-23
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Expires: 1988-02-28
Abstract
Abstract THE PROCESS FOR PREPARATION OF PRIMARY AMINES BY REACTION OF A CARBONYL COMPOUND WITH AN AUXILIARY AMINE IN THE LIQUID PHASE TO PRODUCE AN IMINE WHICH IS THEN CATALYTICALLY HYDROGENATED IN THE PRESENCE OF AMMONIA TO PRODUCE THE PRIMARY AMINE IN WHICH THE AUXILIARY AMINE MAY BE REGENERATED AS A BY-PRODUCT OF THE REACTION FOR RECYCLING TO PRODUCE THE IMINE AND IN WHICH THE OPERATIONS CAN BE CARRIED OUT BATCHWISE OR IN A CONTINUOUS OPERATION.
Inventors
- 👤 Albert Bouniot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:51
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/52
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |