Patent US3038784A successfully refreshed from Google Patents.
US3038784A
Expired / Lapsed
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Production of amorphous aluminas
Assignee: Evonik Operations GmbH
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Filing: 1959-07-01
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Granted: 1962-06-12
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Expires: 1979-07-01
Abstract
No abstract record available.
Inventors
- 👤 Torkar Karl
- 👤 Bergmann Oswald
- 👤 Egghart Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:01
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01F7/36; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; C01P; C01P2002/00; C01P2002/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR PRODUCING AN AMORPHOUS ALUMINA WHICH COMPRISES HYDROLYZING A PURE ALUMINUM ALCOHOLATE WITH PURE WTER IN THE PRESENCE OF HYDROGEN PEROXIDE AT A TEMPERATURE OF FROM ABOUT 0* TO 22* C. TO FORM AMORPHOUS ALUMINA, SAID HYDROGEN PEROXIDE BEING PRESENT IN AN AMOUNT OF FROM 3% TO 30% BY WEIGHT OF THE WATER, AND DRYING SAID AMORPHOUS ALUMINA.
Claim 2
Dependent Claim
60 words
A PROCESS FOR PRODUCING AN AMORPHOUS ALUMINA WHICH COMPRISES HYDROLYZING A PURE ALUMINUM ALCOHOLATE WITH PURE WTER IN THE PRESENCE OF HYDROGEN PEROXIDE AT A TEMPERATURE OF FROM ABOUT 0* TO 22* C. TO FORM AMORPHOUS ALUMINA, SAID HYDROGEN PEROXIDE BEING PRESENT IN AN AMOUNT OF FROM 3% TO 30% BY WEIGHT OF THE WATER, AND DRYING SAID AMORPHOUS ALUMINA.
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) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |