US2686760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic fluids and lubricating compositions
Assignee: Shell Development Co
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Filing: 1951-10-27
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Granted: 1954-08-17
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Expires: 1971-10-27
Abstract
No abstract record available.
Inventors
- 👤 Forrest J Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:52
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2205/22; C10M2207/00; C10M2207/04; C10M2207/042; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/06; C10M2223/061; C10M2223/065; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/12; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A COMPOSITION COMPRISING ESSENTIALLY FROM ABOUT 50% TO ABOUT 92.5% BY WEIGHT OF A NORMALLY LIQUID TRIALKYL PHOSPHATE SAID ESTER HAVING AT LEAST 18 CARBON ATOMS PER MOLECULE, FROM ABOUT 7.5% TO ABOUT 60% BY WEIGHT OF A MINERAL OIL BRIGHT STOCK HAVING A VISCOSITY OF BETWEEN ABOUT 1250 AND 11,000 SUS AT 100* F., SAID OIL CONTAINING LESS THAN ABOUT 15% BY WEIGHT OF AROMATIC HYDROCARBONS AND SAID COMPOSITION CONTAINING FROM ABOUT 0.25% TO ABOUT 5% BY WEIGHT OF AN ALKALINE EARTH METAL SALT OF A CONDENSATION PRODUCT OF FORMALDEHYDE WITH ALKYL PHENOLS THE ALKYL GROUPS THEREOF CONTAINING FROM 4 TO 12 CARBON ATOMS, AND 0.25-5% BY WEIGHT OF A NAPHTHYLAMINE.
Claim 2
Dependent Claim
112 words
A COMPOSITION COMPRISING ESSENTIALLY FROM ABOUT 50% TO ABOUT 92.5% BY WEIGHT OF A NORMALLY LIQUID TRIALKYL PHOSPHATE SAID ESTER HAVING AT LEAST 18 CARBON ATOMS PER MOLECULE, FROM ABOUT 7.5% TO ABOUT 60% BY WEIGHT OF A MINERAL OIL BRIGHT STOCK HAVING A VISCOSITY OF BETWEEN ABOUT 1250 AND 11,000 SUS AT 100* F., SAID OIL CONTAINING LESS THAN ABOUT 15% BY WEIGHT OF AROMATIC HYDROCARBONS AND SAID COMPOSITION CONTAINING FROM ABOUT 0.25% TO ABOUT 5% BY WEIGHT OF AN ALKALINE EARTH METAL SALT OF A CONDENSATION PRODUCT OF FORMALDEHYDE WITH ALKYL PHENOLS THE ALKYL GROUPS THEREOF CONTAINING FROM 4 TO 12 CARBON ATOMS, AND 0.25-5% BY WEIGHT OF A NAPHTHYLAMINE.
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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |