Patent US2764557A successfully refreshed from Google Patents.
US2764557A
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Reactivation of metal-poisoned catalysts
Assignee: ExxonMobil Oil Corp
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Filing: 1952-11-04
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Granted: 1956-09-25
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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
2026-11-01 11:54
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/92; B01J21/00; B01J21/20; B01J23/16; B01J23/24; B01J23/26; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD FOR TREATING A NICKEL-POISONED SILICEOUS HYDROCARBON CONVERSION CATALYST, WHICH COMPRISES IMPREGNATING THE POISONED CATALYST WITH A SMALL AMOUNT OF CHROMIA SUFFICIENT, FOLLOWING HEREINAFTER-DESCRIBED STEAMTREATMENT, TO OVERCOME THE POISONING EFFECTS OF THE NICKEL AND THEREAFTER SUBJECTING THE CHROMIA-IMPREGNATED CATALYST TO STEAM-TREATMENT AT A TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1500* F. FOR AT LEAST 2 HOURS.
Claim 2
Independent Claim
60 words
A METHOD FOR TREATING A NICKEL-POISONED SILICEOUS HYDROCARBON CONVERSION CATALYST, WHICH COMPRISES IMPREGNATING THE POISONED CATALYST WITH A SMALL AMOUNT OF CHROMIA SUFFICIENT, FOLLOWING HEREINAFTER-DESCRIBED STEAMTREATMENT, TO OVERCOME THE POISONING EFFECTS OF THE NICKEL AND THEREAFTER SUBJECTING THE CHROMIA-IMPREGNATED CATALYST TO STEAM-TREATMENT AT A TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1500* F. FOR AT LEAST 2 HOURS.
References Cited (Backward Citations)
GB280712A
Cited
US2014503A
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US2382582A
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US2423833A
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US2581014A
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US2638453A
Cited
US2673187A
Cited
US2668798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |