Patent US2696474A successfully refreshed from Google Patents.
US2696474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparation of alumina organosols and hydrosols
Assignee: Standard Oil Co
•
Filing: 1951-07-27
•
Granted: 1954-12-07
•
Expires: 1971-07-27
Abstract
No abstract record available.
Inventors
- 👤 Heard Llewellyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:34
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD FOR PREPARING AN ALUMINA ORGANOSOL WHICH COMPRISES CONTACTING AMALGAMATED ALUMINUM AT A TEMPERATURE ABOVE ABOUT 150* F. WITH A DILUTE SOLUTION OF A WEAK ORGANIC ACID IN A NEUTRAL, WATER-MISCIBLE OXYGENATED ORGANIC SOLVENT, SAID SOLUTION CONTAINING WATER IN AN AMOUNT AT LEAST STOICHIOMETRICALLY EQUIVALENT TO SAID ALUMINA, WHEREBY SAID AMALGAMATED ALUMINUM IS CONVERTED INTO A FLUID, SUBSTANTIALLY TRANSPARENT ALUMINA ORGANOSOL, AND WITHDRAWING SAID ORGANOSOL.
Claim 2
Independent Claim
66 words
A METHOD FOR PREPARING AN ALUMINA ORGANOSOL WHICH COMPRISES CONTACTING AMALGAMATED ALUMINUM AT A TEMPERATURE ABOVE ABOUT 150* F. WITH A DILUTE SOLUTION OF A WEAK ORGANIC ACID IN A NEUTRAL, WATER-MISCIBLE OXYGENATED ORGANIC SOLVENT, SAID SOLUTION CONTAINING WATER IN AN AMOUNT AT LEAST STOICHIOMETRICALLY EQUIVALENT TO SAID ALUMINA, WHEREBY SAID AMALGAMATED ALUMINUM IS CONVERTED INTO A FLUID, SUBSTANTIALLY TRANSPARENT ALUMINA ORGANOSOL, AND WITHDRAWING SAID ORGANOSOL.
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) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |