US4585577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerosol propellants of monochlorodifluoromethane, dimethylether and methylene chloride
Assignee: EIDP Inc
•
Filing: 1983-12-12
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Granted: 1986-04-29
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Expires: 2003-12-12
Abstract
Abstract Propellant gas compositions for aerosol products are disclosed consisting essentially of monochlorodifluoromethane, dimethyl ether and methylene chloride, said compositions having a vapor pressure of about 50 to 60 psig at 70° 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
2026-11-05 15:52
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/06; A01; A01N; A01N25/00; A01N25/02; A01N25/04; A01N25/06; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/046; A61K8/18; A61K8/30; A61K8/31; A61K8/315; A61K8/33; C; C09; C09K; C09K3/00; C09K3/30; A61K2800/00; A61K2800/40; A61K2800/59; Y; Y10; Y10S; Y10S424/00; Y10S424/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
44 words
An aerosol propellant composition consisting essentially of monochlorodifluoromethane and dimethyl ether where the monochlorodifluoromethane to dimethylether weight ratio is from 50:50 to 30:70, in admixture with methylene chloride, said composition having a vapor pressure in the range of about 50-60 psig at 70° F.
Claim 2
Dependent Claim
44 words
An aerosol propellant composition consisting essentially of monochlorodifluoromethane and dimethyl ether where the monochlorodifluoromethane to dimethylether weight ratio is from 50:50 to 30:70, in admixture with methylene chloride, said composition having a vapor pressure in the range of about 50-60 psig at 70° F.
Claim 3
Dependent Claim
55 words
An aerosol propellant composition consisting essentially of an azeotrope of monochlorodifluoromethane and dimethyl ether in a monochlorodifluoromethane:dimethyl ether weight ratio of 40:60 in admixture with methylene chloride, the proportion of the azeotrope to methylene chloride being such that the vapor pressure of the mixture is in the range of about 50-60 psig at 70° F.
Claim 4
Dependent Claim
55 words
An aerosol propellant composition consisting essentially of an azeotrope of monochlorodifluoromethane and dimethyl ether in a monochlorodifluoromethane:dimethyl ether weight ratio of 40:60 in admixture with methylene chloride, the proportion of the azeotrope to methylene chloride being such that the vapor pressure of the mixture is in the range of about 50-60 psig at 70° F.
Claim 5
Dependent Claim
17 words
The composition of claim 2 in which methylene chloride constitutes 1-28% by weight of the propellant composition.
Claim 6
Dependent Claim
20 words
The composition of claim 3 in which the methylene chloride is present in an amount of about 10-20% by weight.
References Cited (Backward Citations)
US2959325A
Cited
US3590006A
Cited
US3922228A
Cited
US3910848A
Cited
US4145411A
Cited
US4198313A
Cited
US4062795A
Cited
US4174295A
Cited
US4152416A
Cited
US4382078A
Cited
US4444745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |