US3159575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of improving grease yields
Assignee: California Research LLC
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Filing: 1962-08-03
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Granted: 1964-12-01
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Expires: 1982-08-03
Abstract
No abstract record available.
Inventors
- 👤 Dean W Criddle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:38
CPC Classifications
C; C10; C10M; C10M5/00; C10M2201/00; C10M2201/02; C10M2201/06; C10M2201/062; C10M2201/063; C10M2203/00; C10M2203/10; C10M2203/104; C10M2203/106; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/125; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A GREASE COMPOSITION HAVING EXTREME PRESSURE CHARACTERISTICS CONSISTING ESSENTIALLY OF A MINERAL OIL OF LUBRICATING VISCOSITY, FROM ABOUT 7.0% TO ABOUT 12.0% BY WEIGHT OF CALCIUM 12-HYDROXY STEARATE, FROM 6.0% TO ABOUT 12.0% BY WEIGHT OF CALCIUM ACETATE, FROM 2.0% TO ABOUT 6.0% BY WEIGHT OF CALCIUM CARBONATE, FROM 1.0% TO 8.0% BY WEIGHT OF CALCIUM HYDROXIDE, WHEREIN THE MOLE RATIO OF SAID CALCIUM ACETATE TO SAID CALCIUM 12-HYDROXY STEARATE HAS A VALUE FROM 2 TO 5, AND SAID CALCIUM CARBONATE IS DERIVED FROM THE REACTION OF UREA WITH CALCIUM HYDROXIDE, AND FROM 0.1% TO 10% BY WEIGHT OF AN ALKYL METHACRYLATE-VINYL PYRROLIDONE COPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF 100,000 TO 500,000.
Claim 2
Dependent Claim
115 words
A GREASE COMPOSITION HAVING EXTREME PRESSURE CHARACTERISTICS CONSISTING ESSENTIALLY OF A MINERAL OIL OF LUBRICATING VISCOSITY, FROM ABOUT 7.0% TO ABOUT 12.0% BY WEIGHT OF CALCIUM 12-HYDROXY STEARATE, FROM 6.0% TO ABOUT 12.0% BY WEIGHT OF CALCIUM ACETATE, FROM 2.0% TO ABOUT 6.0% BY WEIGHT OF CALCIUM CARBONATE, FROM 1.0% TO 8.0% BY WEIGHT OF CALCIUM HYDROXIDE, WHEREIN THE MOLE RATIO OF SAID CALCIUM ACETATE TO SAID CALCIUM 12-HYDROXY STEARATE HAS A VALUE FROM 2 TO 5, AND SAID CALCIUM CARBONATE IS DERIVED FROM THE REACTION OF UREA WITH CALCIUM HYDROXIDE, AND FROM 0.1% TO 10% BY WEIGHT OF AN ALKYL METHACRYLATE-VINYL PYRROLIDONE COPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF 100,000 TO 500,000.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |