Patent US2532997A successfully refreshed from Google Patents.
US2532997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkaline earth sulfonates
Assignee: Standard Oil Development Co
•
Filing: 1947-11-14
•
Granted: 1950-12-05
•
Expires: 1967-11-14
Abstract
No abstract record available.
Inventors
- 👤 Charles A Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:47
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR PRODUCING A SUBSTANTIALLY PURE OIL-SOLUBLE ALKALINE EARTH METAL SULFONATE SOLUTION IN MINERAL OIL CONCENTRATIONS OF THE ORDER OF 30 TO 70% SULFONATES BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE SOLUTION, WHICH COMPRISES THE STEPS OF ACID TREATING A MINERAL OIL WITH CONCENTRATED H2SO4 TO PRODUCE SULFONIC ACID OF AT LEAST 400 COMBINING WEIGHT CONTACTING SAID TREATED OIL WITH FILTER AID TO REMOVE SUSPENDED IMPURITIES, EXTRACTING SAID SULFONIC ACID WITH AN AQUEOUS WATER SOLUBLE ALIPHATIC ALOCHOL, ADDING MINERAL OIL TO SAID EXTRACT, NEUTRALIZING SAID SULFONIC ACID WITH BASIC ALKALINE EARTH COMPOUND, AND ADDING WATER TO CAUSE SAID AQUEOUS ALCOHOL TO FORM A SEPARATE LAYER LEAVING SULFONATES DISSOLVED IN SAID ADDED MINERAL OIL.
Claim 2
Dependent Claim
116 words
A PROCESS FOR PRODUCING A SUBSTANTIALLY PURE OIL-SOLUBLE ALKALINE EARTH METAL SULFONATE SOLUTION IN MINERAL OIL CONCENTRATIONS OF THE ORDER OF 30 TO 70% SULFONATES BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE SOLUTION, WHICH COMPRISES THE STEPS OF ACID TREATING A MINERAL OIL WITH CONCENTRATED H2SO4 TO PRODUCE SULFONIC ACID OF AT LEAST 400 COMBINING WEIGHT CONTACTING SAID TREATED OIL WITH FILTER AID TO REMOVE SUSPENDED IMPURITIES, EXTRACTING SAID SULFONIC ACID WITH AN AQUEOUS WATER SOLUBLE ALIPHATIC ALOCHOL, ADDING MINERAL OIL TO SAID EXTRACT, NEUTRALIZING SAID SULFONIC ACID WITH BASIC ALKALINE EARTH COMPOUND, AND ADDING WATER TO CAUSE SAID AQUEOUS ALCOHOL TO FORM A SEPARATE LAYER LEAVING SULFONATES DISSOLVED IN SAID ADDED MINERAL OIL.
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) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |