US3290245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions containing amine tungstates
Assignee: Castrol Ltd
•
Filing: 1960-06-03
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Granted: 1966-12-06
•
Expires: 1980-06-03
Abstract
No abstract record available.
Inventors
- 👤 Elliott John Scotchford
- 👤 Edwards Eric Descamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:53
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/18; C10M169/00; C10M2201/00; C10M2201/04; C10M2201/043; C10M2201/06; C10M2201/062; C10M2201/065; C10M2201/066; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2211/00; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/042; C10M2219/044; C10M2219/046; C10M2219/06; C10M2219/062; C10M2219/064; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/085; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/061; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/04; C10N2010/08; C10N2010/12; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/20; C10N2040/22; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR PROPORTION OF A MINERAL OIL OF LUBRICATING VISCOSITY AND DISSOLVES IN SAID OIL A SALT OF TUNGSTIC ACID AN AMINE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
30 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR PROPORTION OF A MINERAL OIL OF LUBRICATING VISCOSITY AND DISSOLVES IN SAID OIL A SALT OF TUNGSTIC ACID AN AMINE HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
126 words
A COMPOSITION AS CLAIMED IN CLAIM 1 WHICH COMPOSITION COMPRISES A MAJOR PROPORTION OF A MINERAL OIL OF LUBRICATING VISCOSITY AND A MINOR PROPORTION OF A COMBINATION OF TWO ADDITIVES, THE FIRST BEING A SALT HAVING THE STATED GENERAL FORMULA, THE SECOND ADDITIVE BEING SELECTED FROM THE GROUP CONSISTING OF ELEMENTARY SULPHUR AND AN ORGANIC SULPHUR COMPOUND CONTAINING DIVALENT SULPHUR SAID SECOND ADDITIVE BEING SOLUBLE IN THE OIL AND CAPABLE OF REACTING WITH THE FIRST ADDITIVE AT TEMPERATURES PRODUCED LOCALLY BY FRICTION UNDER BOUNDARY LUBRICATING CONDITIONS AT METAL SURFACES, SO AS TO FORM A FRICTION-REDUCING SULPHUR-CONTAINING TUNGSTEN COMPOUND, SAID SECOND ADDITIVE BEING PRESENT IN AN AMOUNT TO PROVIDE A SULPHUR CONTENT OF FROM 0.06 TO 5 PERCENT BY WEIGHT ON THE TOTAL WEIGHT OF THE COMPOSITION.
Claim 4
Dependent Claim
16 words
A COMPOSITION AS CLAIMED IN CLAIM 5 WHEREIN THE SULPHUR COMPOUND IS A ZINC DIALKYL DITHIOPHOSPHATE.
References Cited (Backward Citations)
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US2795550A
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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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |