US2579133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivating a silica-alumina catalyst by impregnation with boria
Assignee: Gulf Research and Development Co
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Filing: 1948-12-02
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Granted: 1951-12-18
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Expires: 1968-12-02
Abstract
No abstract record available.
Inventors
- 👤 Benjamin R Warner
- 👤 William A Pardee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:07
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF REACTIVATING A CALCINED PERMANENTLY DEACTIVATED SILICA-ALUMIA CRACKING CATALYST CONSISTING ESSENTIALY OF SILICA AND ALUMINA AND COMPRISING A MAJOR PROPORTION OF SILICA AND A MINOR PROPORTION OF ALUMINA WHICH HAS BEEN PERMANENTLY DEACTIVATED IN USE, WHICH COMPRISES IMPREGNATING THE SURFACE OF SAID CATALYST WITH A FLUID COMPOUND YIELDING BORIA UPON THERMAL DECOMPOSITION IN AN AMOUNT SUFFICIENT TO PRODUCE A REACTIVATED CATALYST, AND THERMALLY DECOMPOSING SAID IMPREGNANT COMPOUND INTO BORIA.
Claim 2
Independent Claim
71 words
THE METHOD OF REACTIVATING A CALCINED PERMANENTLY DEACTIVATED SILICA-ALUMIA CRACKING CATALYST CONSISTING ESSENTIALY OF SILICA AND ALUMINA AND COMPRISING A MAJOR PROPORTION OF SILICA AND A MINOR PROPORTION OF ALUMINA WHICH HAS BEEN PERMANENTLY DEACTIVATED IN USE, WHICH COMPRISES IMPREGNATING THE SURFACE OF SAID CATALYST WITH A FLUID COMPOUND YIELDING BORIA UPON THERMAL DECOMPOSITION IN AN AMOUNT SUFFICIENT TO PRODUCE A REACTIVATED CATALYST, AND THERMALLY DECOMPOSING SAID IMPREGNANT COMPOUND INTO BORIA.
References Cited (Backward Citations)
US2339247A
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US2339249A
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US2357254A
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US2422884A
Cited
US2392588A
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US2407914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |