US2636862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant and hydraulic fluid compositions
Assignee: Shell Development Co
•
Filing: 1950-06-09
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Granted: 1953-04-28
•
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 21:10
CPC Classifications
C; C10; C10M; C10M3/00; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2207/00; C10M2207/04; C10M2207/042; 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; C10M2211/04; C10M2211/042; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/086; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/06; C10M2223/061; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/04; 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
56 words
A HYDRAULIC FLUID COMPOSITION COMPRISING A MAJOR PROPORTION OF A DIALKYLARYLPHOSPHINE OXIDE, 0.25 TO 5% BY WEIGHT OF THE TOTAL COMPOSISTION OF AN EPOXY COMPOUND AND 0.025 TO 1% BY WEIGHT OF THE TOTAL COMPOSITION OF A SULFURCONTAINING ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC DISULFIDES, AROMATIC DISULFIDES, SULFIRIZED SPERM OILS, AND SULFURIZED TERPENES.
Claim 2
Dependent Claim
56 words
A HYDRAULIC FLUID COMPOSITION COMPRISING A MAJOR PROPORTION OF A DIALKYLARYLPHOSPHINE OXIDE, 0.25 TO 5% BY WEIGHT OF THE TOTAL COMPOSISTION OF AN EPOXY COMPOUND AND 0.025 TO 1% BY WEIGHT OF THE TOTAL COMPOSITION OF A SULFURCONTAINING ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC DISULFIDES, AROMATIC DISULFIDES, SULFIRIZED SPERM OILS, AND SULFURIZED TERPENES.
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) | 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 |