US3836561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating alumina containing oxides
Assignee: Union Oil Company of California
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Filing: 1972-08-16
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Granted: 1974-09-17
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Expires: 1992-08-16
Abstract
Abstract PARTICLE FORM ALUMINA-CONTAINING AMORPHOUS OXIDES OR COMBINATIONS THEREOF WITH CRYSTALLINE ZEOLITES ARE ACID TREATED TO INCREASE POROSITY AND PERMEABILITY, DECREASE BULK VOLUME OR IMPROVE ONE OR MORE CHARACTERISTICS OF THE ZEOLITE WITHOUT SUBSTANTIAL LOSS OF STRUCTURAL STRENGTH AT A PH BELOW ABOUT 5 SUFFICIENT TO REACT AT LEAST A PORTION OF THE ALUMINA IN THE AMORPHOUS OXIDE IN THE PRESENCE OF AN IONIZABLE WATEER SOLUBLE SALT.
Inventors
- 👤 D Young
- 👤 Y Linda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:29
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/06; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |