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Patent US2522618A successfully refreshed from Google Patents.
US2522618A
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Extraction of aromatic and sulfur compounds
Assignee: Standard Oil Co
•
Filing: 1949-09-30
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Granted: 1950-09-19
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Expires: 1969-09-30
Abstract
No abstract record available.
Inventors
- 👤 Carl E Johnson
- 👤 Arthur A Harban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:37
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/22; C07; C07C; C07C7/00; C07C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR THE SELECTIVE EXTRACTION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF AROMATIC HYDROCARBONS AND ORGANIC SULFUR COMPOUNDS FROM A MIXTURE COMPRISING A COMPOUND OF SAID CLASS AND AN ALIPHATIC HYDROCARBON, WHICH PROCESS COMPRISES CONTACTING SAID MIXTURE WITH A SELECTIVE SOLVENT CONSISTING ESSENTIALLY OF AN AMINE SALT OF A SULFONIC ACID, SAID SALT HAVING THE FORMULA
Claim 2
Dependent Claim
59 words
A PROCESS FOR THE SELECTIVE EXTRACTION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF AROMATIC HYDROCARBONS AND ORGANIC SULFUR COMPOUNDS FROM A MIXTURE COMPRISING A COMPOUND OF SAID CLASS AND AN ALIPHATIC HYDROCARBON, WHICH PROCESS COMPRISES CONTACTING SAID MIXTURE WITH A SELECTIVE SOLVENT CONSISTING ESSENTIALLY OF AN AMINE SALT OF A SULFONIC ACID, SAID SALT HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |