US4466909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-in-water microemulsion fluid
Assignee: Chevron USA Inc
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Filing: 1980-09-29
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Granted: 1984-08-21
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Expires: 2000-09-29
Abstract
Abstract Disclosed is an oil-in-water micro-emulsion comprising 0.09 to 49.99 percent by mass oil, 50 to 99.9 percent by mass of water, and 0.01 to 10 mass percent of an antiwear agent.
Inventors
- 👤 Robert A. Stayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:44
CPC Classifications
C; C10; C10M; C10M173/00; C10M125/00; C10M125/20; C10M129/00; C10M129/02; C10M129/04; C10M129/06; C10M129/08; C10M129/68; C10M129/76; C10M135/00; C10M135/12; C10M135/14; C10M135/18; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M137/16; C10M2201/00; C10M2201/02; C10M2201/06; C10M2201/065; C10M2201/066; C10M2201/08; C10M2201/082; C10M2201/083; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/14; C10M2205/16; C10M2205/17; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/04; C10M2207/044; C10M2207/28; C10M2207/287; C10M2207/288; C10M2207/289; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/10; C10M2215/102; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/049; C10M2223/08; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/12; C10N2010/14; C10N2010/16; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
An oil-in-water micro-emulsion fluid consisting essentially of: (a) 0.09 to 49.99 percent by mass of oil and a surfactant/cosurfactant which inhibits the separation of the micro-emulsion into separate phases; (b) 50 to 99.9 percent by mass water; (c) 0.01 to 10 percent by mass of an oil soluble metal containing antiwear agent selected from the metal dialkyldithiophosphates, metal dithiocarbamates, metal carboxylates and thiocarboxylates; and (d) 0.01 to 10 percent by mass of urea.
Claim 2
Dependent Claim
73 words
An oil-in-water micro-emulsion fluid consisting essentially of: (a) 0.09 to 49.99 percent by mass of oil and a surfactant/cosurfactant which inhibits the separation of the micro-emulsion into separate phases; (b) 50 to 99.9 percent by mass water; (c) 0.01 to 10 percent by mass of an oil soluble metal containing antiwear agent selected from the metal dialkyldithiophosphates, metal dithiocarbamates, metal carboxylates and thiocarboxylates; and (d) 0.01 to 10 percent by mass of urea.
Claim 3
Dependent Claim
16 words
The micro-emulsion fluid of claim 1 wherein said oil soluble metal compound is a zinc dialkyldithiophosphate.
Claim 4
Dependent Claim
54 words
The oil-in-water micro-emulsion fluid of claim 2 wherein: (a) 0.9 to 10 mass percent of said fluid is said oil and surfactant/cosurfactant; (b) 70 to 99 mass percent of said fluid is water; (c) 0.1 to 5.0 mass percent of said fluid is a zinc dialkyldithiophosphate; and (d) 0.2 to 2.0 mass percent urea.
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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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |