US2595416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of modified forms of alumina
Assignee: Universal Oil Products Co
•
Filing: 1948-09-29
•
Granted: 1952-05-06
•
Expires: 1968-09-29
Abstract
No abstract record available.
Inventors
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:24
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/06; B01J20/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS WHICH COMPRISES COMMINGLING AN ALUMINA CONTAINING GAMMA-ALUMINUM OXIDE WITH A CARBOXYLIC ACID OF AT LEAST 60% BY WEIGHT CONCENTRATION AND IN AN AMOUNT CORRESPONDING TO AT LEAST FOUR MOLECULAR PROPORTIONS OF ACID TO ALUMINA, HEATING THE RESULTANT MIXTURE TO A TEMPERATURE OF FROM ABOUT 150* C. TO ABOUT 300* C. UNDER SUFFICIENT SUPERATMOSPHERIC PRESSURE TO MAINTAIN A SUBSTANTIAL PORTION OF THE ACID IN LIQUID PHASE AND FOR A TIME SUFFICIENT TO CONVERT SAID GAMMA-ALUMINUM OXIDE TO A BASIC ALUMINUM SALT OF SAID ACID, AND THEREAFTER CONVERTING SAID BASIC ALUMINUM SALT TO ALUMINA.
Claim 2
Dependent Claim
94 words
A PROCESS WHICH COMPRISES COMMINGLING AN ALUMINA CONTAINING GAMMA-ALUMINUM OXIDE WITH A CARBOXYLIC ACID OF AT LEAST 60% BY WEIGHT CONCENTRATION AND IN AN AMOUNT CORRESPONDING TO AT LEAST FOUR MOLECULAR PROPORTIONS OF ACID TO ALUMINA, HEATING THE RESULTANT MIXTURE TO A TEMPERATURE OF FROM ABOUT 150* C. TO ABOUT 300* C. UNDER SUFFICIENT SUPERATMOSPHERIC PRESSURE TO MAINTAIN A SUBSTANTIAL PORTION OF THE ACID IN LIQUID PHASE AND FOR A TIME SUFFICIENT TO CONVERT SAID GAMMA-ALUMINUM OXIDE TO A BASIC ALUMINUM SALT OF SAID ACID, AND THEREAFTER CONVERTING SAID BASIC ALUMINUM SALT TO ALUMINA.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |