Patent US5425711A successfully refreshed from Google Patents.
US2768141A
Expired / Lapsed
US
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Noninflammable hydraulic fluids
Assignee: Union Carbide Corp
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Filing: 1952-10-24
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Granted: 1956-10-23
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Expires: 1972-10-24
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Langer
- 👤 Jr John M Russ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:28
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2201/08; C10M2201/082; C10M2201/083; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/107; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A NON-INFLAMMABLE HYDRAULIC FLUID CONSISTING ESSENTIALLY OF A BASE MIXTURE OF WATER AND FROM ABOUT 15% TO 65% BY WEIGHT OF A LOW MOLECULAR WEIGHT GLYCOL, AND CONTAINING A THICKENER IN AMOUNT OF ABOUT 5% TO 50% BY WEIGHT, SAID THICKENER BEING COMPOSED OF THE ADDITION PRODUCT FORMED BY THE CAUSTIC-CATGALYZED SEQUENTIAL REACTION, AT AN ELEVATED TEMPERATURE, OF AN ALKYL PHENOL CONTAINING AT LEAST EIGHT CARBON ATOMS IN THE ALKYL GROUP FIRST WITH 1,2-PROPYLENE OXIDE IN A MOL PROPORTION OF ABOUT 40% TO 60% OF THE NUMBR OF CARBON ATOMS IN THE AFORESAID ALKYL GROUP, AND SECONDLY WITH ETHYLENE OXIDE IN MOL PROPORTIONS ABOUT TWICE THAT OF THE 1,2PROPYLENE OXIDE.
Claim 2
Dependent Claim
110 words
A NON-INFLAMMABLE HYDRAULIC FLUID CONSISTING ESSENTIALLY OF A BASE MIXTURE OF WATER AND FROM ABOUT 15% TO 65% BY WEIGHT OF A LOW MOLECULAR WEIGHT GLYCOL, AND CONTAINING A THICKENER IN AMOUNT OF ABOUT 5% TO 50% BY WEIGHT, SAID THICKENER BEING COMPOSED OF THE ADDITION PRODUCT FORMED BY THE CAUSTIC-CATGALYZED SEQUENTIAL REACTION, AT AN ELEVATED TEMPERATURE, OF AN ALKYL PHENOL CONTAINING AT LEAST EIGHT CARBON ATOMS IN THE ALKYL GROUP FIRST WITH 1,2-PROPYLENE OXIDE IN A MOL PROPORTION OF ABOUT 40% TO 60% OF THE NUMBR OF CARBON ATOMS IN THE AFORESAID ALKYL GROUP, AND SECONDLY WITH ETHYLENE OXIDE IN MOL PROPORTIONS ABOUT TWICE THAT OF THE 1,2PROPYLENE OXIDE.
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |