US2962446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon hydraulic fluids containing boron esters
Assignee: Union Oil Company of California
•
Filing: 1956-02-24
•
Granted: 1960-11-29
•
Expires: 1976-02-24
Abstract
No abstract record available.
Inventors
- 👤 James F Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:23
CPC Classifications
C; C10; C10M; C10M3/00; C10M2227/00; C10M2227/02; C10M2227/06; C10M2227/061; C10M2227/062; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A HYDRAULIC FLUID CONSISTING OF A FLUID SILICON COMPOUND SELECTED FROM THE CLASS CONSISTING OF DIMETHYL POLYSILOXANES, ALKYL SILICATES AND POLYALKYL SILICATES CONTAINING 0.1% TO ABOUT 5% BY WEIGHT OF THE PRODUCT OBTAINED BY REACTING UNDER DEHYDRATING CONDITIONS 1 MOL OF A DIHYDROXY HYDROCARBON COMPOUND CONTAINING ABOUT 6 TO ABOUT 30 CARBON ATOMS PER MOLECULE IN WHICH THE HYDROXYL GROUPS ARE ATTACHED TO CARBON ATOMS SEPARATED BY AT LEAST 1 BUT NOT MORE THAN 2 CARBON ATOMS WITH AN AMOUNT OF A BORON COMPOUND SELECTED FROM THE CLASS CONSISTING OF BORIC ACID AND BORON OXIDE EQUIVALENT TO 1 MOL OF BORIC ACID AND FURTHER REACTING UNDER DEHYDRATING CONDITIONS THE PRODUCT SO OBTAINED WITH 1 MOL OF A MONOHYDROXY ORGANIC COMPOUND HAVING 1 TO 26 CARBON ATOMS PER MOLECULE.
Claim 2
Dependent Claim
128 words
A HYDRAULIC FLUID CONSISTING OF A FLUID SILICON COMPOUND SELECTED FROM THE CLASS CONSISTING OF DIMETHYL POLYSILOXANES, ALKYL SILICATES AND POLYALKYL SILICATES CONTAINING 0.1% TO ABOUT 5% BY WEIGHT OF THE PRODUCT OBTAINED BY REACTING UNDER DEHYDRATING CONDITIONS 1 MOL OF A DIHYDROXY HYDROCARBON COMPOUND CONTAINING ABOUT 6 TO ABOUT 30 CARBON ATOMS PER MOLECULE IN WHICH THE HYDROXYL GROUPS ARE ATTACHED TO CARBON ATOMS SEPARATED BY AT LEAST 1 BUT NOT MORE THAN 2 CARBON ATOMS WITH AN AMOUNT OF A BORON COMPOUND SELECTED FROM THE CLASS CONSISTING OF BORIC ACID AND BORON OXIDE EQUIVALENT TO 1 MOL OF BORIC ACID AND FURTHER REACTING UNDER DEHYDRATING CONDITIONS THE PRODUCT SO OBTAINED WITH 1 MOL OF A MONOHYDROXY ORGANIC COMPOUND HAVING 1 TO 26 CARBON ATOMS PER MOLECULE.
References Cited (Backward Citations)
US2371068A
Cited
US2398187A
Cited
US2642453A
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FR1070757A
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US2721180A
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US2755296A
Cited
US2751355A
Cited
US2813830A
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US2795548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |