Patent US2976229A successfully refreshed from Google Patents.
US2976229A
Expired / Lapsed
US
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Purification of acid oils
Assignee: Universal Oil Products Co
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Filing: 1959-04-24
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Granted: 1961-03-21
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Expires: 1979-04-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Brown
- 👤 William K T Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:20
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04; C10G27/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A PROCESS FOR REMOVING MERCAPTANS FROM AN ALKALINE SOLUTION OF ACID OILS CONTAINING MERCAPTANS, WHICH COMPRISES OXIDIZING SAID MERCAPTANS TO DISULFIDES IN THE PRESENCE OF A PHTHALOCYANINE CATALYST, AND THEREAFTER EXTRACTING DISULFIDES FROM SAID SOLUTION BY CONTACTING THE SAME WITH A SOLVENT CONSISTING ESSENTIALLY OF A NORMALLY LIQUID HYDROCARBON FRACTION AND PREFERENTIALLY DISSOLVING SAID DISULFIDES IN SAID HYDROCARBON FRACTION.
Claim 2
Dependent Claim
59 words
A PROCESS FOR REMOVING MERCAPTANS FROM AN ALKALINE SOLUTION OF ACID OILS CONTAINING MERCAPTANS, WHICH COMPRISES OXIDIZING SAID MERCAPTANS TO DISULFIDES IN THE PRESENCE OF A PHTHALOCYANINE CATALYST, AND THEREAFTER EXTRACTING DISULFIDES FROM SAID SOLUTION BY CONTACTING THE SAME WITH A SOLVENT CONSISTING ESSENTIALLY OF A NORMALLY LIQUID HYDROCARBON FRACTION AND PREFERENTIALLY DISSOLVING SAID DISULFIDES IN SAID HYDROCARBON FRACTION.
Claim 3
Dependent Claim
53 words
A PROCESS FOR REMOVING MERCAPTANS FROM AN ALKALINE SOLUTION OF ACID OILS CONTAINING MERCAPTANS, WHICH COMPRISES OXIDIZING SAID MERCAPTANS TO DISULFIDES IN THE PRESENCE OF A PHTHALOCYANINE CATALYST, PASSING THE PRODUCTS INTO A SETTLING ZONE, IN WHICH AN UPPER DISULFIDE LAYER SEPARATES, SEPARATELY WITHDRAWING AND REMOVING SAID DISULFIDES, AND THEREAFTER EXTRACTING ADDITIONAL DISULFIDES
Claim 4
Dependent Claim
53 words
A PROCESS FOR REMOVING MERCAPTANS FROM AN ALKALINE SOLUTION OF ACID OILS CONTAINING MERCAPTANS, WHICH COMPRISES OXIDIZING SAID MERCAPTANS TO DISULFIDES IN THE PRESENCE OF A PHTHALOCYANINE CATALYST, PASSING THE PRODUCTS INTO A SETTLING ZONE, IN WHICH AN UPPER DISULFIDE LAYER SEPARATES, SEPARATELY WITHDRAWING AND REMOVING SAID DISULFIDES, AND THEREAFTER EXTRACTING ADDITIONAL DISULFIDES
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |