US2809161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant composition
Assignee: California Research LLC
•
Filing: 1955-12-29
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Granted: 1957-10-08
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Lowe Warren
- 👤 William T Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:32
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2203/102; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/16; C10M2207/22; C10M2207/26; C10M2207/262; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2209/109; C10M2211/00; C10M2211/04; C10M2211/044; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/045; C10M2223/06; C10M2223/065; C10M2223/10; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/06; C10N2040/135; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR PORTION OF A MINERAL LUBRICATING OIL IN COMBINATION WITH A MINOR PORTION OF AN ALKALINE EARTH METAL PETROLEUM SULFONATE AND AN ALKALINE EARTH METAL ALKYL PHENATE, SAID COMBINATION BEING CORROSIVE TO METAL SURFACES IN NORMAL USE AND A MINOR PORTION, SUFFICIENT TO INHIBIT CORROSION, OF A MEMBER OF THE GROUP CONSISTING OF M-HEXAHYDROPHTHALIC ACID AND P-HEXAHYDROPHTHALIC ACID AND AMMONIUM AND N-ALKYL AMMONIUM SALTS THEREOF HAVING ALKYL GROUPS OF UP TO 24 CARBON ATOMS EACH, SAID MINOR PORTION OF LUBRICATING OIL DETERGENT ADDITIVE BEING SUFFICIENT TO SUSPEND SAID MEMBER IN THE MINERAL LUBRICATING OIL.
Claim 2
Dependent Claim
99 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR PORTION OF A MINERAL LUBRICATING OIL IN COMBINATION WITH A MINOR PORTION OF AN ALKALINE EARTH METAL PETROLEUM SULFONATE AND AN ALKALINE EARTH METAL ALKYL PHENATE, SAID COMBINATION BEING CORROSIVE TO METAL SURFACES IN NORMAL USE AND A MINOR PORTION, SUFFICIENT TO INHIBIT CORROSION, OF A MEMBER OF THE GROUP CONSISTING OF M-HEXAHYDROPHTHALIC ACID AND P-HEXAHYDROPHTHALIC ACID AND AMMONIUM AND N-ALKYL AMMONIUM SALTS THEREOF HAVING ALKYL GROUPS OF UP TO 24 CARBON ATOMS EACH, SAID MINOR PORTION OF LUBRICATING OIL DETERGENT ADDITIVE BEING SUFFICIENT TO SUSPEND SAID MEMBER IN THE MINERAL LUBRICATING OIL.
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |