US2588970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic fluid composition
Assignee: R M HOLLINGSHEAD CORP
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Filing: 1949-10-17
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Granted: 1952-03-11
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Expires: 1969-10-17
Abstract
No abstract record available.
Inventors
- 👤 Esposito Vito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:20
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A HYDRAULIC FLUID COMPOSITION COMPRISING A MIXTURE CONSISTING ESSENTIALLY OF ABOUT 40-50 PARTS BY WEIGHT OF A GLYCOL, ABOUT 30-40 PARTS OF WEIGHT WATER, AND A MINOR PROPORTION ON THE ORDER OF ABOUT 10-20 PARTS BY WEIGHT OF THE PRODUCT OBTAINED BY REACTING AN ALKYLENE OXIDE WITH TALL OIL AT ELEVATED TEMPERATURE AN ALKYLENE OXIDE WITH TALL OIL AND PRESSURE OF ABOUT 2000-3000 POUNDS PER SQUARE INCH, SAID ALKYLENE OXIDE BEING SELECTED FROM THE CLASS WHICH CONSISTS OF ETHYLENE OXIDE AND PROPYLENE OXIDE, AND BEING INITIALLY PRESENT IN PROPORTIONS OF ABOUT 14-18 MOLS ALKYLENE OXIDE PER MOL TALL OIL.
Claim 2
Dependent Claim
99 words
A HYDRAULIC FLUID COMPOSITION COMPRISING A MIXTURE CONSISTING ESSENTIALLY OF ABOUT 40-50 PARTS BY WEIGHT OF A GLYCOL, ABOUT 30-40 PARTS OF WEIGHT WATER, AND A MINOR PROPORTION ON THE ORDER OF ABOUT 10-20 PARTS BY WEIGHT OF THE PRODUCT OBTAINED BY REACTING AN ALKYLENE OXIDE WITH TALL OIL AT ELEVATED TEMPERATURE AN ALKYLENE OXIDE WITH TALL OIL AND PRESSURE OF ABOUT 2000-3000 POUNDS PER SQUARE INCH, SAID ALKYLENE OXIDE BEING SELECTED FROM THE CLASS WHICH CONSISTS OF ETHYLENE OXIDE AND PROPYLENE OXIDE, AND BEING INITIALLY PRESENT IN PROPORTIONS OF ABOUT 14-18 MOLS ALKYLENE OXIDE PER MOL TALL OIL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |