US2946740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deactivation of poisons on contaminated cracking catalysts
Assignee: Phillips Petroleum Co
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Filing: 1958-04-22
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Granted: 1960-07-26
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Expires: 1978-04-22
Abstract
No abstract record available.
Inventors
- 👤 Vault Albert N De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:17
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J21/00; B01J21/20; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
A PROCESS OF DETACTIVATING CONTAMINANTS ON A CONTAMINATED SILICA-ALUMINA HYDROCARBON CRACKING CATALYST WHICH COMPRISES CONTACTING SAID CATALYST WITH CHROMYL CHLORIDE AT A TEMPERATURE AND FOR A TIME EFFECTIVE TO CAUSE DEACTIVATION OF SAID CONTAMINANTS WITH RESPECT TO FURTHER USE OF SAID CATALYST FOR CRACKING OF HYDROCARBON.
References Cited (Backward Citations)
US2764557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |