US3766239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammoxidation of chloromethyl compounds
Assignee: Rhone Poulenc SA
•
Filing: 1970-12-23
•
Granted: 1973-10-16
•
Expires: 1990-12-23
Abstract
Abstract NITRILES OF FORMULA YCN WHERE Y IS ALKYLPHENYL OR ALKENYL OF FORMULA R2-C(-R3)=C(-R1)- WHERE R1, R2 AND R3 ARE HYDROGEN OR ALKYL, AT LEAST ONE BEING METHYL, ARE OBTAINED BY VAPOUR PHASE AMMOXIDATION USING OXYGEN AND AMMONIA IN THE PRESENCE, AS CATALYST, OF AT LEAST ONE ELEMENT OF GROUPS I-B, III-A, III-B, IV-A, IV-B, V-A, V-B OR VI-B OF THE PERIODIC TABLE OR OF IRON OR OF AT LEAST ONE DERIVATIVE THEREOF.
Inventors
- 👤 Y Colleuille
- 👤 R Perron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; C07C253/28; C07C253/32; C07C253/34; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |