Patent US3787514A successfully refreshed from Google Patents.
US3787514A
Expired / Lapsed
US
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Catalysts for selective hydrogenation of hydrocarbons
Assignee: Rhone Poulenc Industries SA
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Filing: 1972-07-19
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Granted: 1974-01-22
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Expires: 1992-07-19
Abstract
Abstract THE REMOVAL OF UNSATURATED IMPURITIES IN THE PURIFICATION OF ETHYLENIC GASES BY SELECTIVE HYDROGENATION WITH A CATALYST OF PALLADIUM HAVING AN ADDITION OF VANADIUM AS A PROMOTER.
Inventors
- 👤 P Bernusset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:52
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/163; C07C7/167
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |