Patent US2950169A successfully refreshed from Google Patents.
US2950169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing shaped alumina particles of high crushing strength
Assignee: Universal Oil Products Co
•
Filing: 1956-04-23
•
Granted: 1960-08-23
•
Expires: 1976-04-23
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Murray
- 👤 Lester G Massey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:58
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD FOR MANUFACTURING SHAPED ALUMINA-CONTAINING PILLS OF HIGH CRUSHING STRENGTH FROM AN ALUMINA RESULTING FROM THE REACTION OF H2O WITH ALUMINUM AND HAVING A WATER CONTENT OF FROM ABOUT 70% TO ABOUT 85% BY WEIGHT, WHICH COMPRISES FILTERING THE ALUMINA FROM THE REACTION MIXTURE, KNEADING SAID ALUMINA FOR AT LEAST 2 HOURS WHILE DRYING UNTIL THE WATER CONTENT OF THE ALUMINA IS REDUCED TO AN AMOUNT BETWEEN ABOUT 52.5% AND ABOUT 68.5% BY WEIGHT, THEN FUTHER DRYING THE ALUMINA SUFFICIENTLY TO REDUCE ITS WATER CONTENT TO BELOW ABOUT 30% BY WEIGHT, THEREAFTER FORMING THE THUS KNEADED AND DRIED
Claim 2
Independent Claim
99 words
A METHOD FOR MANUFACTURING SHAPED ALUMINA-CONTAINING PILLS OF HIGH CRUSHING STRENGTH FROM AN ALUMINA RESULTING FROM THE REACTION OF H2O WITH ALUMINUM AND HAVING A WATER CONTENT OF FROM ABOUT 70% TO ABOUT 85% BY WEIGHT, WHICH COMPRISES FILTERING THE ALUMINA FROM THE REACTION MIXTURE, KNEADING SAID ALUMINA FOR AT LEAST 2 HOURS WHILE DRYING UNTIL THE WATER CONTENT OF THE ALUMINA IS REDUCED TO AN AMOUNT BETWEEN ABOUT 52.5% AND ABOUT 68.5% BY WEIGHT, THEN FUTHER DRYING THE ALUMINA SUFFICIENTLY TO REDUCE ITS WATER CONTENT TO BELOW ABOUT 30% BY WEIGHT, THEREAFTER FORMING THE THUS KNEADED AND DRIED
References Cited (Backward Citations)
US2635950A
Cited
US2232145A
Cited
US2406420A
Cited
US2758011A
Cited
US2858280A
Cited
US2847387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |