US3812057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of cobalt-molybdenum catalyst used for the removal of diolefins and acetylenes from an olefinic feed
Assignee: Phillips Petroleum Co
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Filing: 1972-01-03
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Granted: 1974-05-21
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Expires: 1992-01-03
Abstract
Abstract A REGENERATED COBALT-MOLYBDENUM CATALYST IS COOLED, CONTACTED WITH STEAM AND THEREAFTER PURGED WITH A PURGING GAS FOR IMPROVING THE OPERATION OF THE CATALYST.
Inventors
- 👤 J Morgan
- 👤 R Ramsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:38
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/163; B; B01; B01J; B01J23/00; B01J23/90; B01J23/94; C07C7/167; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |