Patent US3773683A successfully refreshed from Google Patents.
US3773683A
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Novel suspending agent composition for use in powder aerosol compositions and process for preparation
Assignee: Procter and Gamble Co
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Filing: 1972-01-11
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Granted: 1973-11-20
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Expires: 1992-01-11
Abstract
Abstract A process for the preparation of a propellant containing suspending agent composition having enhanced suspension properties for use in powder aerosol compositions, which process comprises combining a bulking agent selected from the group consisting of montmorillonite clays and hydrophobically treated montmorillonite clays with a propellant and subjecting said combination to high shear mixing until the bulking agent is uniformly dispersed, and the propellant containing suspending agent composition prepared by said process.
Inventors
- 👤 L Aubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:52
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
24 words
The process of claim 1 wherein the polar liquid is ethanol present in a ratio of about 0.45:1 to the amount of bulking agent.
Claim 2
Dependent Claim
20 words
the balance of an anhydrous liquefied propellant selected from the group consisting of hydrocarbons, fluorohydrocarbons, and chlorofluorohydrocarbons and mixtures thereof;
Claim 3
Dependent Claim
64 words
a polar liquid selected from the group consisting of ethanol, methanol, and propylene carbonate in an amount of from about 0.33:1 to about 0.45:1 of polar liquid to amount of bulking agent; B. Subjecting said combination to high shear mixing for a period of time sufficient to achieve a uniform dispersion of the bulking agent; and C. Placing said combination in an aerosol container.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the bulking agent is a hydrophobically treated montmorillonite clay.
Claim 5
Dependent Claim
24 words
The process of claim 3 wherein the hydrophobically treated montmorillonite clay is selected from the group consisting of Bentone-38, Bentone-34, Bentone-27, Bentone-14, and Bentone-LT.
Claim 6
Dependent Claim
23 words
The process of claim 3 wherein the hydrophobically treated montmorillonite clay is Bentone-38 present in an amount of about 1.5 percent by weight.
Claim 7
Dependent Claim
34 words
The process of claim 1 wherein the anhydrous, liquefied propellant is selected from the group consisting of trichloromonofluoromethane, dichlorodifluoromethane, dichlorotetrafluoroethane, monochlorodifluoromethane, monochlorodifluoroethane, trichlorotrifluoroethane, propane, butane, isobutane, 1,1-difluoroethane, 1,1-difluoro-1-chloroethane, dichlorofluoromethane, methylene chloride, and mixtures thereof.
Claim 8
Dependent Claim
24 words
The process of claim 6 wherein the anhydrous, liquefied propellant is selected from the group consisting of trichloromonofluoroethane, dichlorotetrafluoroethane, and trichloromonofluoromethane and mixtures thereof.
Claim 9
Dependent Claim
12 words
The process of claim 7 wherein the anhydrous, liquefied propellant is trichloromonofluoromethane.
Claim 10
Dependent Claim
13 words
The propellant containing suspending agent composition prepared by the process of claim 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |