US2623020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of zinc aluminate spinels and the addition of group vi catalysts thereto
Assignee: Standard Oil Development Co
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Filing: 1949-12-10
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Granted: 1952-12-23
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Expires: 1969-12-10
Abstract
No abstract record available.
Inventors
- 👤 George R Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:38
CPC Classifications
C; C01; C01G; C01G9/00; B; B01; B01J; B01J23/00; B01J23/06; B01J23/16; B01J23/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
THE METHOD OF PREPARING A BASE FOR HYDROCARBON CONVERSION CATALYSTS WHICH COMPRISES DISSOLVING ZINC OXIDE IN AN AQUEOUS SOLUTION OF AN ALUMINUM SALT OF A STRONG MINERAL ACID, ADDING A BASIC PRECIPITANT TO THE RESULTING SOLUTION, SEPARATING AND WASHING THE PRECIPITATE.
Claim 2
Independent Claim
41 words
THE METHOD OF PREPARING A BASE FOR HYDROCARBON CONVERSION CATALYSTS WHICH COMPRISES DISSOLVING ZINC OXIDE IN AN AQUEOUS SOLUTION OF AN ALUMINUM SALT OF A STRONG MINERAL ACID, ADDING A BASIC PRECIPITANT TO THE RESULTING SOLUTION, SEPARATING AND WASHING THE PRECIPITATE.
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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |