US2528347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonflammable hydraulic fluid
Assignee: California Research LLC
•
Filing: 1948-07-13
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Granted: 1950-10-31
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Expires: 1968-07-13
Abstract
No abstract record available.
Inventors
- 👤 Jr George H Denison
- 👤 Neal W Furby
- 👤 Robert O Bolt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:48
CPC Classifications
C; C10; C10M; C10M3/00; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/04; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/08; C10M2209/084; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/024; C10M2211/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
A NONFLAMMABLE HYDRAULIC FLUID COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 40 TO 90 PARTS BY WEIGHT OF HEXACHLOROBUTADIENE; AS A CORROSION INHIBITING AGENT FOR SAID HEXACHLOROBUTADIENE ABOUT 0.1 TO 20 PARTS OF AN ALKALINE EARTH METAL PHENATE SOLUBLE THEREIN; AS A FREEZING POINT DEPRESSING SUBSTANCE ABOUT 5 TO 40 PARTS OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF CHLORINATED BENZENE, NAPHTHALENE AND BIPHENYL, AND MIXTURES THEREOF; AS AN ANTI-WEAR AGENT ABOUT 0.1 TO 5 PARTS OF A PHOSPHATE ESTER; AS A VISCOSITY INDEX IMPROVER ABOUT 9.1 TO 20 PARTS OF AN OIL SOLUBLE POLYMERIZED ESTER OF ACRYLIC ACID; AS A RUST INHIBITOR ABOUT 0.1 TO 10 PARTS OF SODIUM WHITE OIL SULFONATE; SAID COMPOSITION HAVING A VISCOSITY OF ABOUT BETWEEN 2 AND 16 CENTISTOKES AT 130*F., AND AN AUTOGENOUS IGNITION TEMPERATURE BETWEEN ABOUT 750*F. AND 1200*F.
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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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |