US2528751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of acid adsorptive alumina
Assignee: Atlantic Richfield Co
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Filing: 1946-04-17
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Granted: 1950-11-07
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Expires: 1966-04-17
Abstract
No abstract record available.
Inventors
- 👤 James B Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:47
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
THE METHOD OF PRODUCING AN ACID ADSORPTIVE ALUMINA, WHICH CONSISTS IN REACTING THE ENTIRE AMOUNT OF ALUMINUM SULFATE PRESENT IN AN AQUEOUS SOLUTION WITH AN ALKALI METAL BICARBONATE, AND SEPARATING THE ALUMINA FROM THE REACTANT SOLUTION.
Claim 2
Independent Claim
36 words
THE METHOD OF PRODUCING AN ACID ADSORPTIVE ALUMINA, WHICH CONSISTS IN REACTING THE ENTIRE AMOUNT OF ALUMINUM SULFATE PRESENT IN AN AQUEOUS SOLUTION WITH AN ALKALI METAL BICARBONATE, AND SEPARATING THE ALUMINA FROM THE REACTANT SOLUTION.
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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |