Patent US2643705A successfully refreshed from Google Patents.
Patent US2939833A successfully refreshed from Google Patents.
US2939833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of arsenic from reforming feed
Assignee: Universal Oil Products Co
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Filing: 1952-06-14
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Granted: 1960-06-07
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Expires: 1972-06-14
Abstract
No abstract record available.
Inventors
- 👤 Wankat Charles
- 👤 George R Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:00
CPC Classifications
C; C10; C10G; C10G61/00; C10G61/02; C10G61/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR THE CONVERSION OF A PETROLEUM DISTILLATE BOILING IN THE GASOLINE RANGE AND CONTAINING ARSENIC IN AN AMOUNT HAVING A DEACTIVATING EFFECT ON NOBLE METAL CATALYSTS, WHICH COMPRISES TREATING THE DISTILLATE WITH AN ALUMINUM SILICATE AT A TEMPERATURE OF FROM ABOUT ATMOSPHERIC TO BELOW THAT AT WHICH SUBSTANTIAL CRACKING OCCURS TO REMOVE ARSENIC THEREFROM, SEPARATING FROM THE ALUMINUM SILICATE A GASOLINE FRACTION HAVING AN ARSNIC CONTENT OF LESS THAN ABOUT 0.05 PART PER MILLION AND LESS THAN THAT OF SAID DISTILLATE, AND REFORMING THE SEPARATED GASOLINE FRACTION IN THE PRESENCE OF A CATALYST COMPRISING A NOBLE METAL.
Claim 2
Dependent Claim
99 words
A PROCESS FOR THE CONVERSION OF A PETROLEUM DISTILLATE BOILING IN THE GASOLINE RANGE AND CONTAINING ARSENIC IN AN AMOUNT HAVING A DEACTIVATING EFFECT ON NOBLE METAL CATALYSTS, WHICH COMPRISES TREATING THE DISTILLATE WITH AN ALUMINUM SILICATE AT A TEMPERATURE OF FROM ABOUT ATMOSPHERIC TO BELOW THAT AT WHICH SUBSTANTIAL CRACKING OCCURS TO REMOVE ARSENIC THEREFROM, SEPARATING FROM THE ALUMINUM SILICATE A GASOLINE FRACTION HAVING AN ARSNIC CONTENT OF LESS THAN ABOUT 0.05 PART PER MILLION AND LESS THAN THAT OF SAID DISTILLATE, AND REFORMING THE SEPARATED GASOLINE FRACTION IN THE PRESENCE OF A CATALYST COMPRISING A NOBLE METAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |