US2968537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of activated refractory inorganic oxides
Assignee: Universal Oil Products Co
•
Filing: 1958-09-12
•
Granted: 1961-01-17
•
Expires: 1978-09-12
Abstract
No abstract record available.
Inventors
- 👤 William G Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:02
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A PROCESS FOR MANUFACTURING ALUMINA, IN WHICH PROCESS THE ALUMINA IS SUBJECTED TO CALCINATION IN THE PRESENCE OF A FREE OXYGEN-CONTAINING GASEOUS MATERIAL, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE ALUMINA, AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 100*C. TO ABOUT 600*C., WITH CARBON MONOXIDE PRIOR TO THE CALCINATION THEREOF IN THE PRESENCE OF SAID FREE OXYGEN-CONTAINING GASEOUS MATERIAL.
Claim 2
Dependent Claim
61 words
IN A PROCESS FOR MANUFACTURING ALUMINA, IN WHICH PROCESS THE ALUMINA IS SUBJECTED TO CALCINATION IN THE PRESENCE OF A FREE OXYGEN-CONTAINING GASEOUS MATERIAL, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE ALUMINA, AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 100*C. TO ABOUT 600*C., WITH CARBON MONOXIDE PRIOR TO THE CALCINATION THEREOF IN THE PRESENCE OF SAID FREE OXYGEN-CONTAINING GASEOUS MATERIAL.
References Cited (Backward Citations)
US2465314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |