US4450151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder aerosol composition
Assignee: Toyo Aerosol Industry Co Ltd
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Filing: 1979-06-12
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Granted: 1984-05-22
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Expires: 1999-06-12
Abstract
Abstract A powder aerosol composition is obtained by first preparing a suspension consisting of a hydrophobic powdered substance having its pH adjusted to fall within the range 5 to 9, alcohol and water, adding, if required by the desired powder system, an intentional medicine and other auxiliary agents to the suspension and mixing the suspension with 5 to 40 wt % of a propellant in an aerosol container. The thusly produced composition has an improved safety in application, prevents flying properties, has an improved adhesion to the skin and can be produced inexpensively. Thus, the composition is best suited for use in applications such as baby powder, dry shampoo, water-eczema remedy and antiperspirant.
Inventors
- 👤 Takahiro Shinozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:06
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/02; A01N25/04; A01N25/06; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/046; A61K8/18; A61K8/19; A61K8/26; A61K9/00; A61K9/10; A61K9/12; A61Q; A61Q15/00; C; C09; C09K; C09K3/00; C09K3/30; A61Q5/00; A61Q5/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
A powder aerosol composition obtained by mixing a suspension comprising 5 to 60 wt % of at least one hydrophobic powdered substance having a pH in the range 5 to 9, 5 to 80 wt % of alcohol whose number of carbon atoms is in the range 1 to 7 and 5 to 80 wt % of water with 5 to 40 wt % of a propellant having a specific gravity lower than that of said suspension, the resulting suspension having a pH in the range of 5 to 9 and a viscosity in the range of 50 to 1000 cps.
Claim 2
Dependent Claim
101 words
A powder aerosol composition obtained by mixing a suspension comprising 5 to 60 wt % of at least one hydrophobic powdered substance having a pH in the range 5 to 9, 5 to 80 wt % of alcohol whose number of carbon atoms is in the range 1 to 7 and 5 to 80 wt % of water with 5 to 40 wt % of a propellant having a specific gravity lower than that of said suspension, the resulting suspension having a pH in the range of 5 to 9 and a viscosity in the range of 50 to 1000 cps.
Claim 3
Dependent Claim
25 words
A composition according to claim 1, wherein said suspension further comprises suitable amounts of at least one intentional medicine and/or at least one auxiliary agent.
Claim 4
Dependent Claim
27 words
A composition according to claim 1, wherein said hydrophobic powdered substance is suspended in said suspension in an amount preferably ranging from 20 to 30 wt %.
Claim 5
Dependent Claim
29 words
A composition according to claim 1, wherein said hydrophobic powdered substance is selected from the group consisting of talc, Celite, kaolin, red oxide, rice starch, bentonite and aluminum stearate.
Claim 6
Dependent Claim
26 words
A composition according to any one of claims 1 to 4, wherein said hydrophobic powdered substance has a particle size ranging from 70 to 325 mesh.
Claim 7
Dependent Claim
25 words
A composition according to claim 1, wherein said alcohol is added to said suspension in an amount preferably ranging from 25 to 35 wt %.
Claim 8
Dependent Claim
21 words
A composition according to claim 1 or 6, wherein said alcohol is either 95 vol % ethyl alcohol or isopropyl alcohol.
Claim 9
Dependent Claim
25 words
A composition according to claim 1, wherein said water is added to said suspension in an amount preferably ranging from 30 to 40 wt %.
Claim 10
Dependent Claim
45 words
A composition according to claim 2, wherein said intentional medicine and said auxiliary agent are an intentional medicine selected from the group consisting of basic aluminum chloride, methyl salicylate, hydrocortisone, aluminum chlorohydroxide, cortisone sulfate, zinc undecylenic acid and menthol, and an emollient medicine or germicide.
Claim 11
Dependent Claim
26 words
A composition according to claim 1 obtained by mixing 20 to 30 wt % of said propellant with 70 to 80 wt % of said suspension.
Claim 12
Dependent Claim
20 words
A composition according to claim 1 or 10, wherein said propellant is either a liquefied petroleum gas or dimethyl ether.
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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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |