US2897140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the oxidation of mercaptans in the presence of alkali and sulfur dye
Assignee: Compagnie Francaise de Raffinage SA
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Filing: 1955-04-05
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Granted: 1959-07-28
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Expires: 1975-04-05
Abstract
No abstract record available.
Inventors
- 👤 Gislon Andre
- 👤 Weisang Edouard Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:56
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04; B; B01; B01J; B01J31/00; B01J31/02; B01J31/0215; B01J31/0218; B01J31/0222; B01J31/0234; B01J31/0235; B01J31/0237; C07; C07B; C07B45/00; C07B45/06; C10G19/00; C10G19/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
A METHOD OF CONVERTING A SULPHYDRYL CONTAINED IN HYDROCARBON COMPOUNDS TO DISULPHIDE, WHICH COMPRISES MIXING THE SAID HYDROCARBON COMPOUNDS WITH AN AQUEOUS ALKALINE SOLUTION OF AN ALKALINE METAL HYDROXIDE, CONTAINING A DYE OF THE "SULPHUR DYES" GROUP, IN ATHE PRESENCE OF AN OXIDIZING GAS.
Claim 2
Independent Claim
44 words
A METHOD OF CONVERTING A SULPHYDRYL CONTAINED IN HYDROCARBON COMPOUNDS TO DISULPHIDE, WHICH COMPRISES MIXING THE SAID HYDROCARBON COMPOUNDS WITH AN AQUEOUS ALKALINE SOLUTION OF AN ALKALINE METAL HYDROXIDE, CONTAINING A DYE OF THE "SULPHUR DYES" GROUP, IN ATHE PRESENCE OF AN OXIDIZING GAS.
Claim 3
Independent Claim
59 words
A METHOD OF SWEETENING PETROLEUM PRODUCTS WHICH COMPRISES MIXING SOUR PETROLEUM PRODUCTS WITH AN AQUEOUS ALKALINE SOLUTION OF AN ALKALI METAL HYDROXIDE CONATAINING A "SULPHUR DYE" SELECTED FROM THE GROUP CONSISTING OF HYDRONE BLUE, SOLANE BLUE R, SULPHANOL GREEN 21, DARK GREEN, SULPHANOL B, BROWN SULPHANOL BR, BLUE SULPHANOL B, LAVAL CACHOU, BLACK SULPHANOL B AND BLUE SULPHANOL RB.
Claim 4
Independent Claim
59 words
A METHOD OF SWEETENING PETROLEUM PRODUCTS WHICH COMPRISES MIXING SOUR PETROLEUM PRODUCTS WITH AN AQUEOUS ALKALINE SOLUTION OF AN ALKALI METAL HYDROXIDE CONATAINING A "SULPHUR DYE" SELECTED FROM THE GROUP CONSISTING OF HYDRONE BLUE, SOLANE BLUE R, SULPHANOL GREEN 21, DARK GREEN, SULPHANOL B, BROWN SULPHANOL BR, BLUE SULPHANOL B, LAVAL CACHOU, BLACK SULPHANOL B AND BLUE SULPHANOL RB.
References Cited (Backward Citations)
US2556836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |