US2793984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation and use of desulphurisation catalysts
Assignee: BP PLC
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Filing: 1956-02-28
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Granted: 1957-05-28
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Expires: 1976-02-28
Abstract
No abstract record available.
Inventors
- 👤 Northcott Roy Purdy
- 👤 Housam Ernest Carlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:19
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/22; B01J37/26; C; C10; C10G; C10G45/00; C10G45/02; C10G45/24; C10G45/28; C10G45/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
IN THE DESULPHURISATION OF PETTROLEUM HYDROCARBONS BY MEANS OF THE AUTOFINING PROCESS USING A FLUORINEPROMOTED COBALT MOLYBDATE CATALYST AS HEREIN DEFINED, THE IMPROVEMENT WHICH COMPRISES MAINTAINING THE FLUORINE CONTENT OF THE CATALYST BY REACTING THE CATALYST DURING THE PROCESS WITH BENZOTRIFLUROIDE INTRODUCED AS VAPOUR INTO THE AUTOFINING ZONE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |