Patent US2917366A successfully refreshed from Google Patents.
US2917366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high activity alumina
Assignee: Union Oil Company of California
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Filing: 1956-12-03
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Granted: 1959-12-15
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Expires: 1976-12-03
Abstract
No abstract record available.
Inventors
- 👤 Rowland C Hansford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:11
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01F7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD FOR PREPARING HIGH-SURFACE-AREA ALUMINA GELS, WHICH COMPRISES HYDROLYZING AN ALUMINUM POLYESTER OF A POLYHYDRIC ALCOHOL TO OBTAIN A HYDROUS ALUMINA GEL AND TO REGENERATE SAID POLYHYDRIC ALCOHOL, THE DRYING AND CALCINING THE RESULTING HYDROUS GEL, SAID POLYHYDRIC ALCOHOL BEING SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC POLYHYDROXY COMPOUNDS CONTAINING FROM 2 TO 20 CARBON ATOMS AND FROM 2 TO 6 HYDROXYL GROUPS.
Claim 2
Independent Claim
66 words
A METHOD FOR PREPARING HIGH-SURFACE-AREA ALUMINA GELS, WHICH COMPRISES HYDROLYZING AN ALUMINUM POLYESTER OF A POLYHYDRIC ALCOHOL TO OBTAIN A HYDROUS ALUMINA GEL AND TO REGENERATE SAID POLYHYDRIC ALCOHOL, THE DRYING AND CALCINING THE RESULTING HYDROUS GEL, SAID POLYHYDRIC ALCOHOL BEING SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC POLYHYDROXY COMPOUNDS CONTAINING FROM 2 TO 20 CARBON ATOMS AND FROM 2 TO 6 HYDROXYL GROUPS.
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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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |