Patent US3657151A successfully refreshed from Google Patents.
US3657151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst manufacture
Assignee: Chevron USA Inc
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Filing: 1970-01-15
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Granted: 1972-04-18
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Expires: 1990-01-15
Abstract
Abstract A PROCESS FOR PRODUCING CATALYSTS WITH LARGER AVERAGE PORE DIAMETERS WHICH COMPRISES (A) FORMING A HYDROGEL COMPRISING AT LEAST ONE INORGANIC OXIDE, (B) ADDING A DETERGENT TO THE HYDROGEL, AND (C) CARRYING OUT AT LEAST PART OF THE DRYING OF THE HYDROGEL AFTER THE DETERGENT IS ADDED TO THE HYDROGEL. PREFERABLY THE DETERGENT IS A NONIONIC HIGH MOLECULAR WEIGHT DETERGENT COMPOSED ONLY OF CARBON, HYDROGEN, AND OXYGEN.
Inventors
- 👤 Edward D Noble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:11
CPC Classifications
B; B01; B01J; B01J37/00; B01J29/00; B01J29/04; B01J29/06; B01J29/82; C; C10; C10G; C10G2300/00; C10G2300/10; C10G2300/107
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |