Patent US2959557A successfully refreshed from Google Patents.
US2959557A
Expired / Lapsed
US
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Preparation of basic metal fluorides
Assignee: Union Oil Company of California
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Filing: 1957-05-13
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Granted: 1960-11-08
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Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Rowland C Hansford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:24
CPC Classifications
C; C01; C01G; C01G1/00; C01G1/06; C01F; C01F7/00; C01F7/48; C01F7/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A COMPOSITION OF MATTER HAVING A HIGH SURFACE AREA AND SUBSTANTIAL CATALYTIC CRACKING ACTIVITY, WHICH COMPRISES A CALCINED INTIMATE MIXTURE OF ALUMINA HYDRATE AND UP TO ABOUT 50% BY WEIGHT OF A BASIC ALUMINUM FLUORIDE, SAID MIXTURE HAVING BEEN PREPARED BY HYDROLYZING AN ALUMINUM ALKOXIDE WITH AN AQUEOUS HYDROFLUORIC ACID SOLUTION, SAID COMPOSITION BEING SUBSTANTIALLY FREE OF ALUMINUM TRIFLUORIDE.
Claim 2
Dependent Claim
59 words
A COMPOSITION OF MATTER HAVING A HIGH SURFACE AREA AND SUBSTANTIAL CATALYTIC CRACKING ACTIVITY, WHICH COMPRISES A CALCINED INTIMATE MIXTURE OF ALUMINA HYDRATE AND UP TO ABOUT 50% BY WEIGHT OF A BASIC ALUMINUM FLUORIDE, SAID MIXTURE HAVING BEEN PREPARED BY HYDROLYZING AN ALUMINUM ALKOXIDE WITH AN AQUEOUS HYDROFLUORIC ACID SOLUTION, SAID COMPOSITION BEING SUBSTANTIALLY FREE OF ALUMINUM TRIFLUORIDE.
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |