Patent US2899952A successfully refreshed from Google Patents.
US3210293A
Expired / Lapsed
US
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Hydrorefining catalyst base prepared by high ph precipitation
Assignee: Universal Oil Products Co
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Filing: 1962-07-25
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Granted: 1965-10-05
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Mark J O'hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:02
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; B; B01; B01J; B01J21/00; B01J21/12; C10G11/00; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE METHOD OF PREPARING AN ALUMINA-SILICA COMPOSITE WHICH COMPRISES FORMING AN ACIDIC HYDROSOL OF ALUMINA AND SILICA, ADDING SAID HYDROSOL WITH AGITATION TO A LIQUID BODY OF ALKALINE PRECIPITANT AND PRECIPITATING AN ALUMINA-SILICA HYDROGEL THEREFROM AT A PH GREATER THAN ABOUT 7.9.
Claim 2
Independent Claim
42 words
THE METHOD OF PREPARING AN ALUMINA-SILICA COMPOSITE WHICH COMPRISES FORMING AN ACIDIC HYDROSOL OF ALUMINA AND SILICA, ADDING SAID HYDROSOL WITH AGITATION TO A LIQUID BODY OF ALKALINE PRECIPITANT AND PRECIPITATING AN ALUMINA-SILICA HYDROGEL THEREFROM AT A PH GREATER THAN ABOUT 7.9.
References Cited (Backward Citations)
US2355388A
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US2348647A
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US2352484A
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US2905636A
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US3099617A
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US3094480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |