US2656321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making alumina hydrosols
Assignee: Standard Oil Development Co
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Filing: 1951-03-06
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Granted: 1953-10-20
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Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Edward A Hunter
- 👤 Jr Charles N Kimberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:05
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A METHOD FOR PREPARING ALUMINA HYDROSOLS WHICH COMPRISES MIXING ANHYDROUS ALUMINUM ALCOHOLATE WITH AN ANHYDROUS PEPTIZING AGENTT, SELECTED FROM THE GROUP WHICH CONSISTS OF ACETIC ACID, FORMIC ACID, PROPIONIC ACID, GLYCOLIC ACID, LACTIC ACID, TERTARTIC ACID, HYDROGEN CHLORIDE HYDROGEN BROMIDE, ALUMINUM CHLORIDE AND ALUMINUM BROMIDE, ADDING WATER TO THE RESULTING MIXTURE TO HYDROLYZE THE ALCOHOLATE AND REGENERATE THE ALCOHOL AT A TEMPERATURE BETWEEN ABOUT 60* AND 200* F. AND SEPARATING ALUMINA HYDROSOL FROM THE MIXTURE.
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |