Patent US2501367A successfully refreshed from Google Patents.
Patent US3825596A successfully refreshed from Google Patents.
US3825596A
Expired / Lapsed
US
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Process for preparation of n,n-dialkyl toluamide
Assignee: Resonac Holdings Corp
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Filing: 1972-05-23
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Granted: 1974-07-23
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Expires: 1992-05-23
Abstract
Abstract N,N-DIALKYL-M(OR P)-TOLUAMIDE CAN BE PRODUCED BY REACTING M(OR P)-TOLUNITRILE WITH DI- OR TRIALKYLAMINE AND WATER IN THE LIQUID PHASE. REMARKABLY SUPERIOR RESULTS CAN BE OBTAINED BY USING SPECIFIC COMPOUNDS AS CATALYSTS AND/OR REMOVING AMMONIA FORMED DURING THE REACTION FROM THE SYSTEM.
Inventors
- 👤 T Naito
- 👤 M Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:17
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/12
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |