Patent US2596497A successfully refreshed from Google Patents.
US2596497A
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Process of strengthening a calcined supported phosphoric acid catalyst
Assignee: Universal Oil Products Co
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Filing: 1949-10-13
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Granted: 1952-05-13
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Expires: 1969-10-13
Abstract
No abstract record available.
Inventors
- 👤 Julian M Mavity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:01
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR INCREASING THE STRUCTURAL STRENGTH OF A CALCINED COMPOSITE OF A PHOSPHORIC ACID AND A SOLID SUPPORTING MATERIAL WHICH COMPRISES TREATING SAID COMPOSITE WITH A COMPOUND OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND BORON, SAID COMPOUND BEING REACTABLE WITH FREE PHOSPHORIC ACID IN THE COMPOSITE TO FORM A PHOSPHATE OF SAID ELEMENT AND BEING IN SUFFICIENT AMOUNT TO ADD FROM ABOUT 1% TO ABOUT 10% BY WEIGHT OF SAID PHOSPHATE TO THE COMPOSITE, AND CALCINING THE THUS TREATED COMPOSITE.
Claim 2
Dependent Claim
85 words
A PROCESS FOR INCREASING THE STRUCTURAL STRENGTH OF A CALCINED COMPOSITE OF A PHOSPHORIC ACID AND A SOLID SUPPORTING MATERIAL WHICH COMPRISES TREATING SAID COMPOSITE WITH A COMPOUND OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND BORON, SAID COMPOUND BEING REACTABLE WITH FREE PHOSPHORIC ACID IN THE COMPOSITE TO FORM A PHOSPHATE OF SAID ELEMENT AND BEING IN SUFFICIENT AMOUNT TO ADD FROM ABOUT 1% TO ABOUT 10% BY WEIGHT OF SAID PHOSPHATE TO THE COMPOSITE, AND CALCINING THE THUS TREATED COMPOSITE.
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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |