Patent US3711422A successfully refreshed from Google Patents.
US3711422A
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US
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Cracking catalyst restoration with antimony compounds
Assignee: Phillips Petroleum Co
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Filing: 1970-09-08
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Granted: 1973-01-16
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Expires: 1990-09-08
Abstract
Abstract A METHOD OF RESTORING ACTIVITY TO CRACKING CATALYSTS WHICH HAVE BEEN CONTAMINATED WITH METALS WHICH INVOLVES PASSIVATING THE METALS BY CONTACTING THEM WITH ANTIMONYCONTAINING COMPOUNDS AND RESTORING THE CATALYST ACTIVITY THEREAFTER BY CONVENTIONAL CALCINATION TECHNIQUES.
Inventors
- 👤 M Johnson
- 👤 D Tabler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/90; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |