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US2931773A
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Method of dispersing calcium carbonate in lubricating oil
Assignee: ConocoPhillips Co
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Filing: 1956-10-18
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Granted: 1960-04-05
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Expires: 1976-10-18
Abstract
No abstract record available.
Inventors
- 👤 Charles E Thompson
- 👤 Oscar L Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:28
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/24; C10M2201/00; C10M2201/06; C10M2201/062; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/024; C10M2205/14; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/125; C10M2207/128; C10M2207/129; C10M2207/16; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/108; C10M2209/109; C10M2211/00; C10M2211/04; C10M2211/044; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/087; C10M2219/089; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/061; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/04; C10M2225/041; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25; C10N2040/252; C10N2040/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
THE PROCESS OF PREPARING STABLE DISPERSION OF CALCIUM CARBONATE, THE PARTICLE SIZE OF SAID CALCILUM CARBONATE NOT EXCEEDING ABOUT 1 MICRON, IN LUBRICATING OIL COMPOSITIONS, WHICH COMPRISES FORMING A MIXTURE CONSISTING ESSENTIALLY OF 0.5 TO 25 PARTS OF A MINERAL LUBRICATING OIL, 1 PART OF OIL-SOLUBLE DISPERSING AGENT, 0.25 TO 2.5 PARTS OF CALCIUM CYANAMIDE, THE PARTICLES OF WHICH WILL PASS THROUGH A 100-MESH SCREEN, 1 TO 5 PERCENT OF A BASIC WATER-SOLUBLE ALKALI METAL SALT, BASED UPON THE WEIGHT OF CALCIUM CYANAMIDE CONTAINED THEREIN, CHARACTERIZED FURTHER IN THAT THE ANION OF SAID ALKALI METAL SALT, IS SELECTED FROM THE GROUP CONSISTING OF CARBONATE, BICARBONATE, TETRABORATE, ACETATE, SULFIDE, AND PHOSPHATE, AND FROM ABOUT 5 TO 1,000 PARTS PER MILLION PER TOTAL PARTS OF REAGENTS OF AN ANTIFOAM AGENT, HEATING THE MIXTURE TO A TEMPERATURE OF 100 TO 200*C. AND PASSING STEAM AT 0 TO 150 P.S.I.G. THERETHROUGH UNTIL CONVERSION OF CALCIUM CYANAMIDE TO CALCIUM CARBONATE IS SUBSTANTIALLY COMPLETE AND THEN REMOVING THE UNDISPERSED SOLIDS AND WATER.
Claim 2
Dependent Claim
166 words
THE PROCESS OF PREPARING STABLE DISPERSION OF CALCIUM CARBONATE, THE PARTICLE SIZE OF SAID CALCILUM CARBONATE NOT EXCEEDING ABOUT 1 MICRON, IN LUBRICATING OIL COMPOSITIONS, WHICH COMPRISES FORMING A MIXTURE CONSISTING ESSENTIALLY OF 0.5 TO 25 PARTS OF A MINERAL LUBRICATING OIL, 1 PART OF OIL-SOLUBLE DISPERSING AGENT, 0.25 TO 2.5 PARTS OF CALCIUM CYANAMIDE, THE PARTICLES OF WHICH WILL PASS THROUGH A 100-MESH SCREEN, 1 TO 5 PERCENT OF A BASIC WATER-SOLUBLE ALKALI METAL SALT, BASED UPON THE WEIGHT OF CALCIUM CYANAMIDE CONTAINED THEREIN, CHARACTERIZED FURTHER IN THAT THE ANION OF SAID ALKALI METAL SALT, IS SELECTED FROM THE GROUP CONSISTING OF CARBONATE, BICARBONATE, TETRABORATE, ACETATE, SULFIDE, AND PHOSPHATE, AND FROM ABOUT 5 TO 1,000 PARTS PER MILLION PER TOTAL PARTS OF REAGENTS OF AN ANTIFOAM AGENT, HEATING THE MIXTURE TO A TEMPERATURE OF 100 TO 200*C. AND PASSING STEAM AT 0 TO 150 P.S.I.G. THERETHROUGH UNTIL CONVERSION OF CALCIUM CYANAMIDE TO CALCIUM CARBONATE IS SUBSTANTIALLY COMPLETE AND THEN REMOVING THE UNDISPERSED SOLIDS AND WATER.
References Cited (Backward Citations)
US2079051A
Cited
US2671758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |