Patent US3903110A successfully refreshed from Google Patents.
Patent US2585520A successfully refreshed from Google Patents.
US2585520A
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Lubricating compositions containing highly basic metal sulfonates
Assignee: Shell Development Co
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Filing: 1948-12-03
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Granted: 1952-02-12
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Expires: 1968-12-03
Abstract
No abstract record available.
Inventors
- 👤 Paul R Van Ess
- 👤 Hulbert E Sipple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:55
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/24; C07; C07C; C07C309/00; C07C309/01; C07C309/62; C10M2219/00; C10M2219/04; C10M2219/044; C10M2227/00; C10M2227/09; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
185 words
A MINERAL LUBRICATING OIL COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL AND A MINOR PORTION OF AN OIL-SOLUBLE HIGHLY BASIC DIVALENT METAL PETROLEUM SULFONATE OF A STRONGLY BASIC METAL OF GROUP II OF THE PERIODIC TABLE, WHICH A FREE BASICITY SUBSTANTIALLY GREATER THAN THAT OF THE CORRESPONDING MONOBASIC DIVALENT METAL PETROLEUM SULFONATE (RSO3M.OHWHEREIN M IS THE DIVALENT METAL AND RSO3 IS PETROLEUM SULFONATE), THE HIGHLY BASIC PETROLEUM SULFONATE BEING PREPARED BY INTIMATELY CONTACTING ABOUT ONE MOL PROPORTION OF AN OIL-SOLUBLE PETROLEUM SULFONATE OF A STRONGLY BASIC METAL OF GROUP II OF THE PERIODIC TABLE DISSOLVED IN A WATERIMMISCIBLE ORGANIC SOLVENT THEREFOR, WHICH IS NONREACTIVE WITH DIVALENT METAL ALCHOLATES, WITH AT LEAST ABOUT TWO MOL PROPORTIONS OF AN ALCOHOLATE OF A STRONGLY BASIC DIVALENT METAL OF GROUP II OF THE PERIODIC TABLE AND A LOWER MOLECULAR WEIGHT MENOHYDRIC SIMPLE ALCOHOL OF 1 TO 4 CARBON ATOMS UNDER SUBSTANTIALLY NON-AQUEOUS CONDITIONS, SUBSEQUENTLY TREATING THE SOLVENT SOLUTION OF THE RESULTING PRODUCT WITH WATER TO HYDROLYZE THE ALCOHOLATE TO AN HYDROXIDE AND RECOVERING THE RESULTING OIL-SOLUBLE HIGHLY BASIC DIVALENT METAL PETROLEUM SULFONATE FROM RESIDUAL WATER AND ALCOHOL.
References Cited (Backward Citations)
US2361804A
Cited
US2402325A
Cited
US2413311A
Cited
US2467176A
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US2444970A
Cited
US2485861A
Cited
US2501732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |