US2556837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweetening of petroleum distillates
Assignee: Standard Oil Development Co
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Filing: 1949-09-12
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Granted: 1951-06-12
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Expires: 1969-09-12
Abstract
No abstract record available.
Inventors
- 👤 John G Browder
- 👤 Alvin R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
C; C10; C10G; C10G19/00; C10G19/02; C10G19/04; Y; Y10; Y10T; Y10T24/00; Y10T24/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD FOR SWEETENING A SOUR PETROLEUM DISTILLATE CONTAINING MERCAPTANS AND HAVING A FINAL BOILING POINT NO GREATER THAN 750* F. WHICH COMPRISES ADDING TO SAID DISTILLATE A SMALL BUT EFFECTIVE CATALYTIC AMOUNT OF AN AMIDE AND THEN CONTACTING THE SOUR DISTILLATE CONTAINING THE AMIDE WITH A SOLUTION OF AN ALKALI METAL HYDROXIDE WHILE ADDING A SUFFICIENT AMOUNT OF A MILD OXIDIZING AGENT TO CONVERT THE MERCAPTANS TO DISULFIDES AND TO OBTAIN A SWEETENED DISTILLATE.
Claim 2
Independent Claim
75 words
A METHOD FOR SWEETENING A SOUR PETROLEUM DISTILLATE CONTAINING MERCAPTANS AND HAVING A FINAL BOILING POINT NO GREATER THAN 750* F. WHICH COMPRISES ADDING TO SAID DISTILLATE A SMALL BUT EFFECTIVE CATALYTIC AMOUNT OF AN AMIDE AND THEN CONTACTING THE SOUR DISTILLATE CONTAINING THE AMIDE WITH A SOLUTION OF AN ALKALI METAL HYDROXIDE WHILE ADDING A SUFFICIENT AMOUNT OF A MILD OXIDIZING AGENT TO CONVERT THE MERCAPTANS TO DISULFIDES AND TO OBTAIN A SWEETENED DISTILLATE.
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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |