Patent US2676925A successfully refreshed from Google Patents.
US2676925A
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Method of dispersing metal oxides and hydroxides in lubricating oils
Assignee: California Research LLC
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Filing: 1950-12-30
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Granted: 1954-04-27
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Expires: 1970-12-30
Abstract
No abstract record available.
Inventors
- 👤 Eddie G Lindstrom
- 👤 Richard L Woodruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:26
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/123; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/063; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/027; C10M2207/028; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/16; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/068; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/042; C10M2219/044; C10M2219/046; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/08; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/25; C10N2040/252; C10N2040/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS OF INCORPORATING POLYVALENT METAL BASE SUBSTANCES IN LUBRICATING OILS TO PRODUCE STABLE, FILTERABLE COMPOSITIONS, WHICH COMPRISES THE STEPS OF FORMING A MIXTURE OF A LUBRICATING OIL, A DIHYDRIC ALCOHOL OF LESS THAN 6 CARBON ATOMS, AN OIL SOLUBLE POLYVALENT METAL DISPERSANT, AND AN INORGANIC POLYVALENT METAL BASE SELECTED FROM THE GROUP CONSISTING OF OXIDES AND HYDROXIDES, SAID DIHYDRIC ALCOHOL BEING PRESENT IN THE MIXTURE IN AN AMOUNT RANGING FROM 2 TO 50 MOLES FOR EACH MOLE OF SAID INORGANIC METAL BASE, AND HEATING SAID MIXTURE FOR A SUFFICIENT TIME TO EFFECT THE DISPERSION OF SAID INORGANIC METAL BASE IN THE LUBRICATING OIL-DISPERSANT COMPOSITION AND TO REMOVE DIHYDRIC ALCOHOL.
Claim 2
Dependent Claim
110 words
A PROCESS OF INCORPORATING POLYVALENT METAL BASE SUBSTANCES IN LUBRICATING OILS TO PRODUCE STABLE, FILTERABLE COMPOSITIONS, WHICH COMPRISES THE STEPS OF FORMING A MIXTURE OF A LUBRICATING OIL, A DIHYDRIC ALCOHOL OF LESS THAN 6 CARBON ATOMS, AN OIL SOLUBLE POLYVALENT METAL DISPERSANT, AND AN INORGANIC POLYVALENT METAL BASE SELECTED FROM THE GROUP CONSISTING OF OXIDES AND HYDROXIDES, SAID DIHYDRIC ALCOHOL BEING PRESENT IN THE MIXTURE IN AN AMOUNT RANGING FROM 2 TO 50 MOLES FOR EACH MOLE OF SAID INORGANIC METAL BASE, AND HEATING SAID MIXTURE FOR A SUFFICIENT TIME TO EFFECT THE DISPERSION OF SAID INORGANIC METAL BASE IN THE LUBRICATING OIL-DISPERSANT COMPOSITION AND TO REMOVE DIHYDRIC ALCOHOL.
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) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |