US3900420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microgas emulsions and method of forming same
Assignee: MGD Inc
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Filing: 1972-09-14
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Granted: 1975-08-19
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Expires: 1992-09-14
Abstract
Abstract A microgas emulsion is disclosed behaving like a Newtonian liquid and consisting essentially of a fine dispersion of gas bubbles, substantially all of which are of colloidal dimensions, in a continuous liquid phase containing a soluble emulsifier in an amount sufficient to lower the surface tension of the liquid to a level at which the gas bubbles are stabilized. A process for producing these emulsions is provided by creating a region of low pressure in a flow of liquid containing the emulsifier and introducing gas into that region.
Inventors
- 👤 Felix Sebba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:12
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1278; C02F3/1294; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/2319; B01F25/00; B01F25/50; B01F25/51; C02F3/20; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/26; Y10S261/54; Y10S261/75; Y10S435/00; Y10S435/812
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
60 words
A MICROGAS EMULSION CONSISTING ESSENTIALLY OF FROM ABOUT 20% TO 60% BY VOLUME UNDISSOLVED GAS IN THE FORM OF SPHERICAL BUBBLES OF COLLOIDAL SIZE DISTRIBUTED IN AN AQUEOUS LIQUID CONTAINING AT LEAST A SMALL BUT EFFECTIVE AMOUNT OF A SOLUBLE EMULSIFIER TO STABILIZE THE EMULSION, SAID EMULSION HAVING A VISCOSITY WHICH IS NOT SUBSTANTIALLY GREATER THAN THAT OF THE LIQUID.
Claim 2
Dependent Claim
60 words
A MICROGAS EMULSION CONSISTING ESSENTIALLY OF FROM ABOUT 20% TO 60% BY VOLUME UNDISSOLVED GAS IN THE FORM OF SPHERICAL BUBBLES OF COLLOIDAL SIZE DISTRIBUTED IN AN AQUEOUS LIQUID CONTAINING AT LEAST A SMALL BUT EFFECTIVE AMOUNT OF A SOLUBLE EMULSIFIER TO STABILIZE THE EMULSION, SAID EMULSION HAVING A VISCOSITY WHICH IS NOT SUBSTANTIALLY GREATER THAN THAT OF THE LIQUID.
Claim 3
Dependent Claim
22 words
A microgas emulsion as set forth in claim 1 wherein said bubbles have a diameter of from about 1 to 10 microns.
Claim 4
Dependent Claim
18 words
A microgas emulsion as set forth in claim 1 and having a half-life of at least 5 minutes.
Claim 5
Dependent Claim
76 words
A microgas emulsion consisting essentially of from about 20% to 60% by volume undissolved gas in the form of spherical bubbles of colloidal size distributed in aqueous liquid containing at least a small but effective amount of a soluble emulsifier to stabilize the emulsion, said emulsion having a viscosity which is not substantially greater than that of the liquid and said emulsion having been made by aspirating said gas into a flowing body of said liquid.
Claim 6
Dependent Claim
76 words
A microgas emulsion consisting essentially of from about 20% to 60% by volume undissolved gas in the form of spherical bubbles of colloidal size distributed in aqueous liquid containing at least a small but effective amount of a soluble emulsifier to stabilize the emulsion, said emulsion having a viscosity which is not substantially greater than that of the liquid and said emulsion having been made by aspirating said gas into a flowing body of said liquid.
Claim 7
Dependent Claim
22 words
A microgas emulsion as set forth in claim 4 wherein said bubbles have a diameter of from about 1 to 10 microns.
Claim 8
Dependent Claim
36 words
A microgas emulsion as set forth in claim 4 wherein said emulsion is made by aspirating said gas into said flowing body of said liquid at a venturi through which said flowing body of liquid passes.
Claim 9
Independent Claim
70 words
A METHOD OF FORMING A MICROGAS EMULSION FROM GAS AND AN AQUEOUS LIQUID CONTAINING AT LEAST A SMALL BUT EFFECTIVE AMOUNT OF A SOLUBLE EMULSIFIER TO STABILIZE THE EMULSION, SAID METHOD COMPRISING ASPIRATING GAS INTO A FLOWING BODY OF SAID AQUEOUS LIQUID THEREBY TO FORM AN EMULSION OF SAID GAS IN SAID LIQUID AND ASPIRATING GAS INTO A FLOWING BODY OF SAID EMULSION THEREBY TO INCREASE THE GAS CONTENT THEREOF.
Claim 10
Independent Claim
70 words
A METHOD OF FORMING A MICROGAS EMULSION FROM GAS AND AN AQUEOUS LIQUID CONTAINING AT LEAST A SMALL BUT EFFECTIVE AMOUNT OF A SOLUBLE EMULSIFIER TO STABILIZE THE EMULSION, SAID METHOD COMPRISING ASPIRATING GAS INTO A FLOWING BODY OF SAID AQUEOUS LIQUID THEREBY TO FORM AN EMULSION OF SAID GAS IN SAID LIQUID AND ASPIRATING GAS INTO A FLOWING BODY OF SAID EMULSION THEREBY TO INCREASE THE GAS CONTENT THEREOF.
Claim 11
Dependent Claim
48 words
A method as set forth in claim 7 wherein the flowing body of the emulsion initially formed is cycled to the location where the gas was aspirated into said liquid to form said emulsion at which location the gas is aspirated into said flowing body of said emulsion.
Claim 12
Dependent Claim
53 words
A method as set forth in claim 7 wherein the gas aspirated into said flowing body of liquid and into said flowing body of said emulsion is aspirated through apertures of minimal dimensions whereby the gas in said emulsion is caused to be present therein in the form of bubbles of colloidal size.
Claim 13
Dependent Claim
42 words
A method as set forth in claim 9 wherein the dimensions of said apertures are such as to cause the gas in said emulsion to be present in the form of bubbles having a diameter of from about 1 to 10 microns.
Claim 14
Dependent Claim
32 words
A method as set forth in claim 9 wherein the gas aspirated into said flowing body of liquid and into said flowing body of emulsion is fed to said apertures under pressure.
Claim 15
Dependent Claim
40 words
A method as set forth in claim 9 wherein each of said flowing body of liquid and said flowing body of emulsion is caused to flow through a venturi, and wherein said apertures are at the location of a venturi.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |