Patent US2839468A successfully refreshed from Google Patents.
US2839468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet turbine lubricant composition
Assignee: California Research LLC
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Filing: 1956-05-10
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Granted: 1958-06-17
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 William T Stewart
- 👤 Jr George J Benoit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:29
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/107; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/043; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A LUBRICANT COMPOSITION COMPRISING (A) FROM 90 TO 98% BY WEIGHT OF A MIXTURE OF METHYL-2-ETHTLHEXYL DIETHERS OF POLY(OXYETHYLENE-1,2-OXYPROPYLENE) GLYCOLS HAVING APPROXIMATELY EQUIMOLAR PROPORTIONS OF SAID OXYETHYLENE AND 1,2-OXYPROPYLENE GROUPS, AND HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 350 AND 700, A VISCOSITY BETWEEN 5,000 AND 12,000 CS. AT -65*F. AND 2.5 AND 3.5 CS. AT 210*F., A POUR POINT BELOW -65*F., AND A FLASH POINT ABOVE 350*F., (B) FROM 0.5 TO 3% OF PHENYL-A-NAPHTHYLAMINE, (C) FROM 0.1 TO 0.5% BY WEIGHT OF A BLEND OF AN ALKYAMINE ACID ALKYL PHOSPHATE WITH AN ALKYL DIHYDROGEN PHOSPHATE WHEREIN THE AMINE SALT COMPONENT IS PRESENT TO THE EXTENT OF FROM 25 TO 95% BY WEIGHT, THE ALKYL GROUPS IN SAID ESTER CONTAINING FROM 8 TO 18 CARBON ATOMS EACH, (D) FROM 0.5 TO 5% AY WEIGHT OF TRICRESYL PHOSPHATE (E) FROM 0.01 TO 0.1% BY WEIGHT OF QUINIZARIN, AND (F) FROM 0.0001 TO 0.02% BY WEIGHT OF DIMETHYL SILICONE POLYMER FOAM INHIBITOR.
Claim 2
Dependent Claim
159 words
A LUBRICANT COMPOSITION COMPRISING (A) FROM 90 TO 98% BY WEIGHT OF A MIXTURE OF METHYL-2-ETHTLHEXYL DIETHERS OF POLY(OXYETHYLENE-1,2-OXYPROPYLENE) GLYCOLS HAVING APPROXIMATELY EQUIMOLAR PROPORTIONS OF SAID OXYETHYLENE AND 1,2-OXYPROPYLENE GROUPS, AND HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 350 AND 700, A VISCOSITY BETWEEN 5,000 AND 12,000 CS. AT -65*F. AND 2.5 AND 3.5 CS. AT 210*F., A POUR POINT BELOW -65*F., AND A FLASH POINT ABOVE 350*F., (B) FROM 0.5 TO 3% OF PHENYL-A-NAPHTHYLAMINE, (C) FROM 0.1 TO 0.5% BY WEIGHT OF A BLEND OF AN ALKYAMINE ACID ALKYL PHOSPHATE WITH AN ALKYL DIHYDROGEN PHOSPHATE WHEREIN THE AMINE SALT COMPONENT IS PRESENT TO THE EXTENT OF FROM 25 TO 95% BY WEIGHT, THE ALKYL GROUPS IN SAID ESTER CONTAINING FROM 8 TO 18 CARBON ATOMS EACH, (D) FROM 0.5 TO 5% AY WEIGHT OF TRICRESYL PHOSPHATE (E) FROM 0.01 TO 0.1% BY WEIGHT OF QUINIZARIN, AND (F) FROM 0.0001 TO 0.02% BY WEIGHT OF DIMETHYL SILICONE POLYMER FOAM INHIBITOR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |