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US4543202A
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Aerosol propellant compositions
Assignee: EIDP Inc
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Filing: 1984-03-23
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Granted: 1985-09-24
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Expires: 2004-03-23
Abstract
Abstract Propellant gas compositions for aerosol products consisting essentially of monochlorodifluoromethane, dimethyl ether and 1-chloro-1,1-difluoroethane, said compositions having a vapor pressure of about 50 to 60 psig at 70 DEG F.
Inventors
- 👤 Philip L. Bartlett
- 👤 John J. Daly, Jr.
- 👤 John D. Sterling, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:34
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/02; A61K8/04; A61K8/046; A61K8/31; A61K8/315; A61Q; A61Q13/00; A61Q5/00; A61Q5/06; C; C09; C09K; C09K3/00; C09K3/30; A61K2800/00; A61K2800/40; A61K2800/59; Y; Y10; Y10S; Y10S424/00; Y10S424/01; Y10S426/00; Y10S426/811
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
24 words
An aerosol composition comprising 1-37% by weight of 1-chloro-1,1-difluoroethane, the balance being a mixture of monochlorodifluoromethane and dimethyl ether in a 40/60 weight ratio.
Claim 2
Dependent Claim
24 words
An aerosol composition comprising 1-37% by weight of 1-chloro-1,1-difluoroethane, the balance being a mixture of monochlorodifluoromethane and dimethyl ether in a 40/60 weight ratio.
Claim 3
Dependent Claim
19 words
The composition of claim 1 in which the 1-chloro-1,1-difluoroethane is present in an amount of about 20-30% by weight.
References Cited (Backward Citations)
US3207386A
Cited
US4174295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |