Patent US5170987A successfully refreshed from Google Patents.
Patent US2823173A successfully refreshed from Google Patents.
US2823173A
Expired / Lapsed
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Methods of refining petroleum products
Assignee: Compagnie Francaise de Raffinage SA
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Filing: 1953-03-06
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Granted: 1958-02-11
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Expires: 1973-03-06
Abstract
No abstract record available.
Inventors
- 👤 Gislon Andre
- 👤 Quiquerez Joseph Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:04
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04; C10G27/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
THE PROCESS OF SWEETENING A LIQUID PETROLEUM PROD-UCT WHICH COMPRISES ADDING TO SAID PRODUCT IN THE PRESENCE OF OXYGEN A MINOR QUANITY OF AN IMINOPHENOL AND A MINOR QUANTITY OF A GROUP VIII METAL COMPOUND IN A FORM MISCIBLE WITH SAID PETROLEUM PRODUCT TO THEREBY FORM IN SITU IN SAID PRODUCT AN ORGANIC COMPOUND OF SAID GROUP VIII METAL HAVING AT LEAST ONE CHELATE BOND.
Claim 2
Dependent Claim
65 words
THE PROCESS OF SWEETENING A LIQUID PETROLEUM PROD-UCT WHICH COMPRISES ADDING TO SAID PRODUCT IN THE PRESENCE OF OXYGEN A MINOR QUANITY OF AN IMINOPHENOL AND A MINOR QUANTITY OF A GROUP VIII METAL COMPOUND IN A FORM MISCIBLE WITH SAID PETROLEUM PRODUCT TO THEREBY FORM IN SITU IN SAID PRODUCT AN ORGANIC COMPOUND OF SAID GROUP VIII METAL HAVING AT LEAST ONE CHELATE BOND.
Claim 3
Dependent Claim
50 words
THE PROCESS OF SWEETENING A LIQUID PETROLEUM PRODUCT WHICH COMPRISES OXIDIZING MERCAPTANS THEREIN IN THE PRESENCE OF OXYGEN WHILE THERE IN PRESENT IN THE PETROLEUM PRODUCT ITSELF A SMALL QUANTITY OF A COBALT COMPOUND IN A FORM MISCIBLE WITH SAID PETROLEUM PRODUCT AND A SMALL QUANTITY OF A SCHIFF BASE.
Claim 4
Dependent Claim
50 words
THE PROCESS OF SWEETENING A LIQUID PETROLEUM PRODUCT WHICH COMPRISES OXIDIZING MERCAPTANS THEREIN IN THE PRESENCE OF OXYGEN WHILE THERE IN PRESENT IN THE PETROLEUM PRODUCT ITSELF A SMALL QUANTITY OF A COBALT COMPOUND IN A FORM MISCIBLE WITH SAID PETROLEUM PRODUCT AND A SMALL QUANTITY OF A SCHIFF BASE.
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |