US2847387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina compositions
Assignee: Standard Oil Co
•
Filing: 1954-12-30
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Granted: 1958-08-12
•
Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Everet F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:15
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428; C01P; C01P2006/00; C01P2006/80; C01P2006/82
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
43 words
A METHOD FOR PREPARING ALUMINA FROM ALUMINUM WHICH COMPRISES REACTING ALUMINUM MERAL WITH WATER IN THE PRESENCE OF ABOUT 0.1 TO 2 PERCENT BY WEIGHT OF GALLIUM AS CATALYST, AT A TEMPERATURE ABOVE ABOIUT 140*F. FOR A TIME SUFFICIENT TO FORM HYDROUS ALUMINA.
Claim 2
Independent Claim
43 words
A METHOD FOR PREPARING ALUMINA FROM ALUMINUM WHICH COMPRISES REACTING ALUMINUM MERAL WITH WATER IN THE PRESENCE OF ABOUT 0.1 TO 2 PERCENT BY WEIGHT OF GALLIUM AS CATALYST, AT A TEMPERATURE ABOVE ABOIUT 140*F. FOR A TIME SUFFICIENT TO FORM HYDROUS ALUMINA.
Claim 3
Dependent Claim
18 words
THE METHOD OF CLAIM 1 INCLUDING THE STEP, AFTER FORMATION OF SAID HYDROUS ALUMINA, OF INCORPORATING PLATINUM THEREIN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |