US2799653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing lubricant additive compositions
Assignee: Standard Oil Co
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Filing: 1953-06-22
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Granted: 1957-07-16
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Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Clyde S Scanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:36
CPC Classifications
C; C10; C10M; C10M163/00; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M159/00; C10M159/12; C10M159/123; C10M159/126; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/12; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/14; C10N2010/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF PREPARING A STABLE COMPATIBLE COMPOSITION COMPRISING IN ADMIXTURE A HYDROCARBON LUBRICATING OIL, FROM ABOUT 20% TO ABOUT 98% OF AN OIL-SOLUBLE REACTION PRODUCT OF A PHOSPHORUS SULFIDE AND A HYDROCARBON, NEUTRALIZED WITH AN ALKALI METAL BASIC COMPOUNDS, AND FROM ABOUT 2% TO ABOUT 80% OF A POLYVALENT METAL SALT OF A DIHYDROCARBON DITHIOPHOSPHATE NORMALLY UNSTABLE IN SAID COMPOSITION, COMPRISING HEATING SAID ADMIXTURE AT A TEMPERATURE OF FROM ABOUT 240*F. TO ABOUT 450F. FOR AT LEAST ONE-HALF HOUR UNTIL A COOLED SAMPLE OF THE HEAT-TREATED MIXTURE REMAINS CLEAR WITHOUT DEVELOPING A PRECIPITATE AFTER ABOUT AT LEAST 3 WEEKS.
Claim 2
Independent Claim
100 words
THE METHOD OF PREPARING A STABLE COMPATIBLE COMPOSITION COMPRISING IN ADMIXTURE A HYDROCARBON LUBRICATING OIL, FROM ABOUT 20% TO ABOUT 98% OF AN OIL-SOLUBLE REACTION PRODUCT OF A PHOSPHORUS SULFIDE AND A HYDROCARBON, NEUTRALIZED WITH AN ALKALI METAL BASIC COMPOUNDS, AND FROM ABOUT 2% TO ABOUT 80% OF A POLYVALENT METAL SALT OF A DIHYDROCARBON DITHIOPHOSPHATE NORMALLY UNSTABLE IN SAID COMPOSITION, COMPRISING HEATING SAID ADMIXTURE AT A TEMPERATURE OF FROM ABOUT 240*F. TO ABOUT 450F. FOR AT LEAST ONE-HALF HOUR UNTIL A COOLED SAMPLE OF THE HEAT-TREATED MIXTURE REMAINS CLEAR WITHOUT DEVELOPING A PRECIPITATE AFTER ABOUT AT LEAST 3 WEEKS.
References Cited (Backward Citations)
US2476813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |