US2535784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing mahogany acids and mahogany soaps
Assignee: Standard Oil Development Co
•
Filing: 1946-12-03
•
Granted: 1950-12-26
•
Expires: 1966-12-03
Abstract
No abstract record available.
Inventors
- 👤 Charles A Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:31
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN THE PREPARATION OF PREFERENTIALLY OILSOLUBLE SULFONIC ACID SOAPS IN WHICH A HYDROCARBON OIL IS TREATED WITH FUMING SULFURIC ACID, THE SLUDGE SEPARATED, AND THE SOUR OIL NEUTRALIZED TO FORM PREFERENTIALLY OIL-SOLUBLE SULFONATES, THE IMPROVEMENT COMPRISING CONTACTING THE SOUR OIL WITH FROM 0.02 TO 10% OF A SOLID SORBENT MATERIAL, REMOVING THE SORBENT MATERIAL, NEUTRALIZING THE OIL AND RECOVERING PREFERENTIALLY OIL-SOLUBLE SULFONIC ACID SOAPS.
Claim 2
Dependent Claim
64 words
IN THE PREPARATION OF PREFERENTIALLY OILSOLUBLE SULFONIC ACID SOAPS IN WHICH A HYDROCARBON OIL IS TREATED WITH FUMING SULFURIC ACID, THE SLUDGE SEPARATED, AND THE SOUR OIL NEUTRALIZED TO FORM PREFERENTIALLY OIL-SOLUBLE SULFONATES, THE IMPROVEMENT COMPRISING CONTACTING THE SOUR OIL WITH FROM 0.02 TO 10% OF A SOLID SORBENT MATERIAL, REMOVING THE SORBENT MATERIAL, NEUTRALIZING THE OIL AND RECOVERING PREFERENTIALLY OIL-SOLUBLE SULFONIC ACID SOAPS.
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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) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |