US3631058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of chlorinated n-methyl imidazoles
Assignee: Bayer AG
•
Filing: 1968-07-11
•
Granted: 1971-12-28
•
Expires: 1988-07-11
Abstract
Abstract CHLORINATED N-METHYL IMIDAZOLES ARE OBTAINED BY CHLORINATING DIMETHYLAMINO ACETONITRILE IN AN INERT SOLVENT AT TEMPERATURES OF UP TO 150*C. BY RAISING THE CHLORINATION TEMPERATURE BY ABOUT 10 TO 20*C. PER HOUR.
Inventors
- 👤 Gunther Beck
- 👤 Hans Holtschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:48
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/54; C07D233/66; C07D233/68
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |