US2659699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic fluid of polyhydric alcohol and trialkyl phosphate
Assignee: Lockheed Martin Corp
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Filing: 1949-07-28
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Granted: 1953-11-17
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Expires: 1969-07-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Melvin F George
- 👤 Jr Perry M Reedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/08; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/107; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A HYDRAULIC FLUID COMPRISING THE COMBINATION OF ONE OR MORE TRIALKYL PHOSPHATES, EACH OF SAID PHOSPHATES HAVING A TOTAL OF 6-24 CARBON ATOMS, WITH EACH OF ITS ALKYL GROUPS HAVING LESS THAN 9 CARBON ATOMS AND AN ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT CAPABLE OF MATERIALLY INHIBITING THE SWELLING EFFECT OF SAID TRIALKYL PHOSPHATE ON A COPOLYMER OF BUTADIENE AND ACRYLONITRILE, SAID ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT BEING MISCIBLE WITH SAID TRIALKYL PHOSPHATE IN THE VOLUME RATIO OF AT LEAST 10 PARTS OF SAID ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT TO 90 PARTS OF SAID TRIALKYL PHOSPHATE, THE VOLUME RATIO OF SAID TRIALKYL PHOSPHATE TO SAID ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT OF SAID FLUID BEING IN THE RANGE OF 90-10 TO 55-45, SAID TRIALKYL PHOSPHATE BEING PRESENT IN SAID FLUID TO THE EXTENT OF 50-90% BY VOLUME, SAID ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, ETHYLENE GLYCOL, DIETHYLENE GLYCOL, PROPYLENE GLYCOL, BUTYLENE GLYCOL, TETRAETHYLENE GLYCOL, POLYPROPYLENE GLYCOL OF 400-1200 MOLECULAR WEIGHT AND MIXTURES THEREOF.
Claim 2
Dependent Claim
162 words
A HYDRAULIC FLUID COMPRISING THE COMBINATION OF ONE OR MORE TRIALKYL PHOSPHATES, EACH OF SAID PHOSPHATES HAVING A TOTAL OF 6-24 CARBON ATOMS, WITH EACH OF ITS ALKYL GROUPS HAVING LESS THAN 9 CARBON ATOMS AND AN ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT CAPABLE OF MATERIALLY INHIBITING THE SWELLING EFFECT OF SAID TRIALKYL PHOSPHATE ON A COPOLYMER OF BUTADIENE AND ACRYLONITRILE, SAID ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT BEING MISCIBLE WITH SAID TRIALKYL PHOSPHATE IN THE VOLUME RATIO OF AT LEAST 10 PARTS OF SAID ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT TO 90 PARTS OF SAID TRIALKYL PHOSPHATE, THE VOLUME RATIO OF SAID TRIALKYL PHOSPHATE TO SAID ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT OF SAID FLUID BEING IN THE RANGE OF 90-10 TO 55-45, SAID TRIALKYL PHOSPHATE BEING PRESENT IN SAID FLUID TO THE EXTENT OF 50-90% BY VOLUME, SAID ALIPHATIC POLYHYDRIC ALCOHOL COMPONENT SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, ETHYLENE GLYCOL, DIETHYLENE GLYCOL, PROPYLENE GLYCOL, BUTYLENE GLYCOL, TETRAETHYLENE GLYCOL, POLYPROPYLENE GLYCOL OF 400-1200 MOLECULAR WEIGHT AND MIXTURES THEREOF.
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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) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |