US3791967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodesulfurization with a porous xerogel catalyst containing hydrogenating components and metal phosphate dispersion
Assignee: Chevron USA Inc
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Filing: 1972-03-27
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Granted: 1974-02-12
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Expires: 1992-03-27
Abstract
Abstract HYDRODESULFURIZATION IS CARRIED OUT WITH A POROUS XEROGEL OF ALUMINA, SILICA OR MIXTURES THEREOF CONTAINING: NICKEL OR COBALT; TUNGSTEN; AND A TETRAVALENT METAL PHOSPHATE DISPERSION IN WHICH THE METAL IS EITHER TITANIUM, ZIRCONIUM, THORIUM, TIN, HAFNIUM OR CERIUM.
Inventors
- 👤 J Jaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:53
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |