US2547181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillate sweetening process
Assignee: Standard Oil Co
•
Filing: 1949-01-12
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Granted: 1951-04-03
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Expires: 1969-01-12
Abstract
No abstract record available.
Inventors
- 👤 Theodore B Tom
- 👤 Jack H Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:00
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE PROCESS OF SWEETENING A HYDROCARBON OIL THAT CONTAINS MERCAPTANS WHICH COMPRISES EXTRACTING SAID OIL WITH AN AQUEOUS CAUSTIC-METHANOL SOLUTION UNTIL THE MAJOR PART OF THE MERCAPTANS ARE REMOVED FROM THE OIL, SEPARATING SUBSTANTIALLY ALL THE MERCAPTAN RICH SOLUTION FROM THE OIL, AND CONTACTING THE EXTRACTED OIL WHICH STILL CONTAINS SOME CAUSTIC AND METHANOL WITH A GAS CONTAINING FREE OXYGEN UNTIL THE OIL IS SUBSTANTIALLY MERCAPTAN-FREE.
Claim 2
Dependent Claim
66 words
THE PROCESS OF SWEETENING A HYDROCARBON OIL THAT CONTAINS MERCAPTANS WHICH COMPRISES EXTRACTING SAID OIL WITH AN AQUEOUS CAUSTIC-METHANOL SOLUTION UNTIL THE MAJOR PART OF THE MERCAPTANS ARE REMOVED FROM THE OIL, SEPARATING SUBSTANTIALLY ALL THE MERCAPTAN RICH SOLUTION FROM THE OIL, AND CONTACTING THE EXTRACTED OIL WHICH STILL CONTAINS SOME CAUSTIC AND METHANOL WITH A GAS CONTAINING FREE OXYGEN UNTIL THE OIL IS SUBSTANTIALLY MERCAPTAN-FREE.
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) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |