US2958583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alumina
Assignee: Universal Oil Products Co
•
Filing: 1958-10-01
•
Granted: 1960-11-01
•
Expires: 1978-10-01
Abstract
No abstract record available.
Inventors
- 👤 George L Hervert
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:02
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR PRODUCING ALUMINA WHICH COMPRISES REACTING METALLIC ALUMINUM AT A TEMPERATURE OF FROM ABOUT 30*F. TO ABOUT 705*F. WITH LIQUID WATER HAVING DISSOLVED THEREIN A CATALYTIC AMOUNT OF A WATER-SOLUBLE HETEROCYCLIC NITROGEN-CONTAINING ORGANIC BASE SELECTED FROM THE GROUP CONSISTING OF PIPERIDINE, MORPHOLINE, PYRIDINE, PICOLINE, LUTIDINE AND COLLIDINE, FOR A TIME SUFFICIENT TO REACT A SUBSTANTIAL PORTION, AT LEAST, OF THE ALUMINUM WITH THE WATER, AND SEPARATING THE RESULTANT ALUMINA FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
75 words
A PROCESS FOR PRODUCING ALUMINA WHICH COMPRISES REACTING METALLIC ALUMINUM AT A TEMPERATURE OF FROM ABOUT 30*F. TO ABOUT 705*F. WITH LIQUID WATER HAVING DISSOLVED THEREIN A CATALYTIC AMOUNT OF A WATER-SOLUBLE HETEROCYCLIC NITROGEN-CONTAINING ORGANIC BASE SELECTED FROM THE GROUP CONSISTING OF PIPERIDINE, MORPHOLINE, PYRIDINE, PICOLINE, LUTIDINE AND COLLIDINE, FOR A TIME SUFFICIENT TO REACT A SUBSTANTIAL PORTION, AT LEAST, OF THE ALUMINUM WITH THE WATER, AND SEPARATING THE RESULTANT ALUMINA FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2872418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |