Patent US3833638A successfully refreshed from Google Patents.
US3833638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammoxidation of saturated hydrocarbons
Assignee: Monsanto Co
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Filing: 1972-11-14
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Granted: 1974-09-03
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Expires: 1992-11-14
Abstract
Abstract METHOD FOR THE PRODUCTION OF ACRYLONITRILE OR METHACRYLONITRILE FROM PROPANE OR ISOBUTANE, AMMONIA AND OXYGEN EMPLOYING CATALYST CONTAINING CERIUM, MOLYBDENUM AND BISMUTH OR TELLURIUM. A HALOGEN MAY ALSO BE USED.
Inventors
- 👤 G Tullman
- 👤 W Knox
- 👤 K Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:53
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/31; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |