US2997439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of hydrogen sulphide from hydrocarbons with anthraquinone disulfonic acids
Assignee: Clayton Aniline Co Ltd
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Filing: 1960-05-03
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Granted: 1961-08-22
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Expires: 1980-05-03
Abstract
No abstract record available.
Inventors
- 👤 Nicklin Thomas
- 👤 Anthony W Sommerville
- 👤 Brunner Ernest
- 👤 Isherwood Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:42
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; C10; C10G; C10G27/00; C10G27/04; C10G27/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR THE REMOVAL OF HYDROGEN SULFIDE FROM LIQUID HYDROCARBONS, IN WHICH THE LIQUID HYDROCARBONS ARE BROUGHT INTO CONTACT WITH AN AQUEOUS WASHING LIQUID COMPRISING AN ALKALINE SOLUTION OF AT LEAST ONE ANTHRAQUINONE DISULFONIC ACID, WHEREBY THE HYDROGEN SULFIDE IS OXIDIZED AND SULFUR IS LIBERATED, AND THE REDUCED ANTHRAQUINONE DISULFONIC ACID IS RE-OXIDIZED BY MEANS OF A GAS CONSISTING AT LEAST IN PART OF FREE OXYGEN.
Claim 2
Dependent Claim
67 words
A PROCESS FOR THE REMOVAL OF HYDROGEN SULFIDE FROM LIQUID HYDROCARBONS, IN WHICH THE LIQUID HYDROCARBONS ARE BROUGHT INTO CONTACT WITH AN AQUEOUS WASHING LIQUID COMPRISING AN ALKALINE SOLUTION OF AT LEAST ONE ANTHRAQUINONE DISULFONIC ACID, WHEREBY THE HYDROGEN SULFIDE IS OXIDIZED AND SULFUR IS LIBERATED, AND THE REDUCED ANTHRAQUINONE DISULFONIC ACID IS RE-OXIDIZED BY MEANS OF A GAS CONSISTING AT LEAST IN PART OF FREE OXYGEN.
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |