US3574754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for production of primary amines
Assignee: Celanese Canada Inc
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Filing: 1967-11-15
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Granted: 1971-04-13
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Expires: 1987-11-15
Abstract
Abstract A PROCESS FOR THE HYDROGENATION OF NITRILES FOR OBTAINING HIGH YIELD OF PRIMARY AMINES WHERE ONLY A FRACTION OF THE HYDROGEN IS DELIVERD AT A TIME. THE HYDROGEN IS FED AS CONTINUOUS FLOWS. EACH FLOW IS INTRODUCED ALONG THE REACTION ZONE GENERALLY AT REGULAR INTERVALS.
Inventors
- 👤 Gerald A Specken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:27
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/44; C07C209/48
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |