US3939088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-resistant hydraulic fluid
Assignee: Chevron USA Inc
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Filing: 1974-03-25
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Granted: 1976-02-17
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Expires: 1994-03-25
Abstract
Abstract A water-in-oil emulsion finding use as a stable functional fluid comprises about 19 to about 50 weight percent water, about 80 to about 49 weight percent mineral oil and a small amount of a hydrocarbyl-substituted succinic acid mono ester of a polyoxyethylene mono-ol. The mono-ol has an average molecular weight of about 200-1,000 and the hydrocarbyl substituent is from about 750 to about 2,000 average molecular weight.
Inventors
- 👤 Alfred Goldschmidt
- 👤 Robert A. Stayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:35
CPC Classifications
C; C10; C10M; C10M173/00; C08; C08F; C08F8/00; C08F8/14; C10M2201/00; C10M2201/02; C10M2203/00; C10M2203/10; C10M2203/102; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/10; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A water-in-oil emulsion finding use as a functional fluid comprises from about 19 to about 50 weight percent of water, from about 80 to about 49 weight percent of mineral oil and in an amount sufficient to stabilize said water-in-oil emulsion a hydrocarbyl-substituted succinic acid monoester of a polyoxyethylene mono-ol of average molecular weight from about 200 to about 1,000 terminated with an alkyl group of 1 to 5 carbon atoms, wherein said hydrocarbyl substituent is of from about 750 to about 2,000 average molecular weight.
Claim 2
Dependent Claim
86 words
A water-in-oil emulsion finding use as a functional fluid comprises from about 19 to about 50 weight percent of water, from about 80 to about 49 weight percent of mineral oil and in an amount sufficient to stabilize said water-in-oil emulsion a hydrocarbyl-substituted succinic acid monoester of a polyoxyethylene mono-ol of average molecular weight from about 200 to about 1,000 terminated with an alkyl group of 1 to 5 carbon atoms, wherein said hydrocarbyl substituent is of from about 750 to about 2,000 average molecular weight.
Claim 3
Dependent Claim
30 words
A water-in-oil emulsion according to claim 1 wherein said hydrocarbyl substituent is a polyolefin itself derived from C2-C6 mono-olefins with the proviso that ethylene is copolymerized with a higher olefin.
Claim 4
Dependent Claim
12 words
A water-in-oil emulsion according to claim 2 wherein said polyolefin is polyisobutylene.
Claim 5
Dependent Claim
13 words
A water-in-oil emulsion according to claim 1 wherein said alkanol is methyl alcohol.
Claim 6
Dependent Claim
21 words
A water-in-oil emulsion according to claim 1 wherein said polyoxyethylene mono-ol contains an average of from 5 to 10 oxyethylene groups.
Claim 7
Dependent Claim
38 words
A water-in-oil emulsion according to claim 1 wherein said polyoxyethylene mono-ol is of about 315-385 average molecular weight and is derived from methanol, and wherein said hydrocarbyl substituent is of from about 900 to about 1,400 molecular weight.
Claim 8
Dependent Claim
21 words
A water-in-oil emulsion according to claim 1 wherein said amount sufficient to stabilize said water-in-oil emulsion is about 0.1-5 weight percent.
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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |