Patent US2636861A successfully refreshed from Google Patents.
US2636861A
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Hydraulic fluid
Assignee: Shell Development Co
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Filing: 1950-06-09
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Granted: 1953-04-28
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Expires: 1970-06-09
Abstract
No abstract record available.
Inventors
- 👤 Forrest J Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
C; C10; C10M; C10M3/00; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2207/00; C10M2207/04; C10M2207/042; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/14; C10M2207/142; C10M2207/22; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/105; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/04; C10M2211/042; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/083; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A COMPOSITION OF MATTER COMPRISING 50-90 PER CENT BY WEIGHT OF A TRIALKYL PHOSPHATE, EACH ALKYL RADICAL OF WHICH CONTAINS 4 TO 9 CARBON ATOMS; 5-25% BY WEIGHT OF A TRIARYL PHOSPHATE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
36 words
A COMPOSITION OF MATTER COMPRISING 50-90 PER CENT BY WEIGHT OF A TRIALKYL PHOSPHATE, EACH ALKYL RADICAL OF WHICH CONTAINS 4 TO 9 CARBON ATOMS; 5-25% BY WEIGHT OF A TRIARYL PHOSPHATE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US1963489A
Cited
US2342636A
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US2410608A
Cited
US2404871A
Cited
US2509620A
Cited
US2566623A
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US2549270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |