Patent US2758097A successfully refreshed from Google Patents.
US2758097A
Expired / Lapsed
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Reactivation of metal-poisoned catalysts
Assignee: ExxonMobil Oil Corp
•
Filing: 1952-11-04
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Granted: 1956-08-07
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Expires: 1972-11-04
Abstract
No abstract record available.
Inventors
- 👤 Harry G Doherty
- 👤 Charles J Plank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:02
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; B01J27/00; B01J27/28; B01J27/285; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
A METHOD FOR OVERCOMING THE POISONING EFFECTS OF NICKEL CONTAMINANT CONTAINED IN A SILICEOUS CRACKING CATALYST, WHICH COMPRISES IMPREGNATING SAID CATALYST WITH A SMALL AMOUNT OF PHOSPHORUS PENTOXIDE FOLLOWED BY STREAM TREATMENT OF THE CATALYST AT A TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1500* F. FOR AT LEAST ABOUT 2 HOURS.
References Cited (Backward Citations)
GB280712A
Cited
US2120723A
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US2120702A
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US2428741A
Cited
US2569092A
Cited
US2575457A
Cited
US2668798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |