Patent US4595522A successfully refreshed from Google Patents.
US4595522A
Expired / Lapsed
US
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Aerosol propellants of monochlorodifluoromethane, dimethylether and butane
Assignee: EIDP Inc
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Filing: 1983-12-12
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Granted: 1986-06-17
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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 a hydrocarbon selected from the group consisting of butane, isobutane and mixtures thereof, 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
2026-11-06 15:17
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; A61K8/30; A61K8/31; A61K8/315; A61K8/33; A61Q; A61Q15/00; A61Q9/00; A61Q9/02; C; C09; C09K; C09K3/00; C09K3/30; A61K2800/00; A61K2800/40; A61K2800/59
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
56 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 a hydrocarbon selected from the group consisting of butane and isobutane and mixtures thereof said composition having a vapor pressure in the range of about 50-60 psig at 70° F.
Claim 2
Dependent Claim
56 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 a hydrocarbon selected from the group consisting of butane and isobutane and mixtures thereof said composition having a vapor pressure in the range of about 50-60 psig at 70° F.
Claim 3
Dependent Claim
36 words
The composition of claim 1 in which the hydrocarbon is insobutane and the components of the composition are as set forth in FIG. 1 for compositions having a vapor pressure of 50-60 psig at 70° F.
Claim 4
Dependent Claim
36 words
The composition of claim 1 in which the hydrocarbon is butane as the components of the composition are as set forth in FIG. 2 for compositions having a vapor pressure of 50-60 psig at 70° F.
Claim 5
Dependent Claim
63 words
An aerosol propellant composition consisting essentially of an azeotrope of monochlorodifluoromethane and dimethyl ether in a 40/60 weight ratio in admixture with a hydrocarbon selected from the group consisting of butane and isobutane and mixtures thereof, the proportion of the azeotrope to hydrocarbon being such that the vapor pressure of the mixture is in the range of about 50-60 psig at 70° F.
Claim 6
Dependent Claim
63 words
An aerosol propellant composition consisting essentially of an azeotrope of monochlorodifluoromethane and dimethyl ether in a 40/60 weight ratio in admixture with a hydrocarbon selected from the group consisting of butane and isobutane and mixtures thereof, the proportion of the azeotrope to hydrocarbon being such that the vapor pressure of the mixture is in the range of about 50-60 psig at 70° F.
Claim 7
Dependent Claim
11 words
The composition of claim 4 in which the hydrocarbon is butane.
Claim 8
Dependent Claim
16 words
The composition of claim 5 in which butane constitutes 1-39% by weight of the propellant composition.
Claim 9
Dependent Claim
11 words
The composition of claim 4 in which the hydrocarbon is isobutane.
Claim 10
Dependent Claim
19 words
The composition of claim 7 in which the isobutane is present in an amount of about 1-70% by weight.
Claim 11
Dependent Claim
19 words
The composition of claim 7 in which the isobutane is present in an amount of about 50-70% by weight.
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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) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |