US4139607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerosol propellant for personal products
Assignee: Hampshire Chemical Corp
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Filing: 1977-08-05
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Granted: 1979-02-13
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Expires: 1997-08-05
Abstract
Abstract Certain fluorinated dimethyl ethers have been found to possess the stability, the compatibility and sufficient freedom from deleterious physiological effects to be used as aerosol propellants in cosmetic, hygienic, pharmaceutical and other personal products. Bis(difluoromethyl) ether is also free of the chlorine atoms believed responsible for some destruction of ozone in the upper atmosphere. Bis(difluoromethyl) ether and carbon dioxide provides a combined gaseous and liquefied propellant system having improved aerosol pattern and emptying characteristics and eliminates the compressed gas effect usually shown by use of carbon dioxide in propellant systems.
Inventors
- 👤 Charles W. Simons
- 👤 Gerald J. O'Neill
- 👤 Joel A. Gribens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:31
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/10; A61K9/12; A61K9/124; C; C09; C09K; C09K3/00; C09K3/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
18 words
An aerosol container pressurized by a propellant system consisting essentially of liquefied bis(difluoromethyl) ether and gasous carbon dioxide.
Claim 2
Dependent Claim
18 words
An aerosol container pressurized by a propellant system consisting essentially of liquefied bis(difluoromethyl) ether and gasous carbon dioxide.
Claim 3
Dependent Claim
26 words
The container of claim 1 wherein the propellant system contains from about 0.5 to about 4.0 weight percent carbon dioxide based on weight of bis(difluoromethyl) ether.
Claim 4
Dependent Claim
19 words
The container of claim 2 wherein the propellant system additionally contains up to 50% by weight of dimethyl ether.
Claim 5
Dependent Claim
21 words
The container of claim 2 wherein the bis(difluoromethyl) ether is mixed with denatured ethanol in a weight ratio of about 50:50.
Claim 6
Dependent Claim
10 words
The container of claim 2 in which medicinals are packaged.
Claim 7
Dependent Claim
10 words
The container of claim 2 in which pharmaceuticals are packaged.
Claim 8
Dependent Claim
11 words
The container of claim 2 in which sorbitan trioleate is packaged.
Claim 9
Dependent Claim
23 words
The container of claim 4 wherein the propellant system additionally contains about 50% by weight dimethyl ether based on weight of bis(difluoromethyl) ether.
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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |