US4041148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New aerosol propellants for personal products
Assignee: Hampshire Chemical Corp
•
Filing: 1976-08-16
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Granted: 1977-08-09
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Expires: 1996-08-16
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, hygenic, pharmaceutical and other personal products. These compounds, bis(difluoromethyl) ether and perfluorodimethyl ether, are also free of the chlorine atoms believed responsible for some destruction of ozone in the upper atmosphere.
Inventors
- 👤 Charles W. Simons
- 👤 Gerald J. O'Neill
- 👤 Joel A. Gribens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:49
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
19 words
An aerosol container pressurized by a material selected from the class consisting of bis(difluoromethyl)ether, perfluorodimethyl ether and mixtures thereof.
Claim 2
Dependent Claim
19 words
An aerosol container pressurized by a material selected from the class consisting of bis(difluoromethyl)ether, perfluorodimethyl ether and mixtures thereof.
Claim 3
Dependent Claim
19 words
The container of claim 1 wherein the pressurizing material additionally contains up to 50% by weight of dimethyl ether.
Claim 4
Dependent Claim
25 words
The container of claim 1 wherein the pressurizing ether employed is bis(difluoromethyl)ether which is mixed with denatured ethanol in a weight ratio of about 50:50.
Claim 5
Dependent Claim
24 words
The container of claim 1 in which there is packaged a personal product selected from the class consisting of toiletries, hygienic preparations and pharmaceuticals.
References Cited (Backward Citations)
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |