US2501732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified lubricating oil
Assignee: Union Oil Company of California
•
Filing: 1947-02-03
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Granted: 1950-03-28
•
Expires: 1967-02-03
Abstract
No abstract record available.
Inventors
- 👤 Richard W Mertes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:32
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/24; C10M2205/00; C10M2205/16; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/09; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/20; C10M2209/00; C10M2209/10; C10M2209/101; C10M2211/00; C10M2211/04; C10M2211/044; C10M2211/06; C10M2215/00; C10M2215/14; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/087; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2223/06; C10M2223/061; C10M2223/063; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/04; C10M2227/00; C10M2227/09; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/12; C10N2010/14; C10N2010/16; C10N2060/00; C10N2060/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A MINERAL LUBRICATING OIL CONTAINING A MINOR BUT EFFECTIVE PROPORTION, IN THE ORDER OF ABOUT 0.5% TO 10%, SUFFICIENT TO IMPART DETERGENCY CHARACTERISTICS TO SAID OIL, OF A COMPLEX FORMED BY HEATING AN OIL-SOLUBLE LEAD PETROLEUM SULFONATE WITH AN AMOUNT OF AN INORGANIC BASE SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDES, HYDROXIDES, CARBONATES AND BICARBONATES IN THE PRESENCE OF MINERAL OIL TO A TEMPERATURE OF ABOUT 150*F. TO 500F., SUFFICIENT TO SOLUBILIZE SAID COMPLEX IN THE OIL, TO TAKE UP ABOUT 5% TO 45% BASED ON THE SULFONATE OF THE INORGANIC BASE IN SAID COMPLEX AND DEHYDRATE THE MIXTURE, SAID INORGANIC BASE HAVING THE FUNCTION OF ENHANCING THE DETERGENT CAPACITY OF THE SULFONATE.
Claim 2
Dependent Claim
114 words
A MINERAL LUBRICATING OIL CONTAINING A MINOR BUT EFFECTIVE PROPORTION, IN THE ORDER OF ABOUT 0.5% TO 10%, SUFFICIENT TO IMPART DETERGENCY CHARACTERISTICS TO SAID OIL, OF A COMPLEX FORMED BY HEATING AN OIL-SOLUBLE LEAD PETROLEUM SULFONATE WITH AN AMOUNT OF AN INORGANIC BASE SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDES, HYDROXIDES, CARBONATES AND BICARBONATES IN THE PRESENCE OF MINERAL OIL TO A TEMPERATURE OF ABOUT 150*F. TO 500F., SUFFICIENT TO SOLUBILIZE SAID COMPLEX IN THE OIL, TO TAKE UP ABOUT 5% TO 45% BASED ON THE SULFONATE OF THE INORGANIC BASE IN SAID COMPLEX AND DEHYDRATE THE MIXTURE, SAID INORGANIC BASE HAVING THE FUNCTION OF ENHANCING THE DETERGENT CAPACITY OF THE SULFONATE.
References Cited (Backward Citations)
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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) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |