Patent US3707501A successfully refreshed from Google Patents.
US3707501A
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Hydraulic fluids containing certain quaternary phosphonium salts of phosphorus acids
Assignee: Stauffer Chemical Co
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Filing: 1970-06-29
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Granted: 1972-12-26
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Expires: 1990-06-29
Abstract
Abstract DATA OBTAINED IN A MODIFIED BOEING WEAR APPARATUS REVEALED THAT AIRCRAFT HYDRAULIC FLUIDS CONTAINING A PHOSPHATE ESTER BASE STOCK AND A SMALL PERCENTAGE OF METHYL TRIOCTYL PHOSPHONIUM DIMETHYL PHOSPHATE EXHIBIT SUPERIOR WEAR-EROSION CHARACTERISTICS WHEN COMPARED WITH THE SAME FORMULATIONS CONTAINING EITHER SMALL PERCENTAGES OF WATER OR NO ADDITIVE.
Inventors
- 👤 William F Gentit
- 👤 Fred Jaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:38
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M137/00; C10M137/12; C10M137/14; C10M2201/00; C10M2201/02; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2209/103; C10M2209/105; C10M2209/108; C10M2209/109; C10M2211/00; C10M2211/02; C10M2211/024; C10M2211/04; C10M2211/042; C10M2211/044; C10M2211/06; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/087; C10M2219/089; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/047; C10M2223/049; C10M2223/06; C10M2223/061; C10M2223/065; C10M2227/00; C10M2227/02; C10M2227/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10M2229/05; C10M2229/051; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/08; C10N2040/12; C10N2040/13; C10N2040/20; C10N2040/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |