Patent US5061394A successfully refreshed from Google Patents.
US5061394A
Expired / Lapsed
US
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Azeotropic composition of 1-chloro-1,2,2,2-tetrafluoroethane and dimethyl ether
Assignee: EIDP Inc
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Filing: 1990-03-13
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Granted: 1991-10-29
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Expires: 2010-03-13
Abstract
Abstract The azeotrope of 1-chloro-1,2,2,2-tetrafluoroethane and dimethyl ether is useful as a refrigerant, aerosol propellant and polymer foam blowing agent.
Inventors
- 👤 Donald B. Bivens
- 👤 Akimichi Yokozeki
- 👤 Philip L. Bartlett
- 👤 Joseph A. Creazzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:49
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/149; C09; C09K; C09K3/00; C09K3/30; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5086; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02825; C23G5/02829; C08J2207/00; C08J2207/04; C09K2205/00; C09K2205/10; C09K2205/11; C09K2205/32; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S521/00; Y10S521/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
20 words
A binary azeotropic mixture consisting essentially of about 40.0 to 99.5 weight percent 1-chloro-1,2,2,2-tetrafluoroethane and the remainder being dimethyl ether.
Claim 2
Dependent Claim
20 words
A binary azeotropic mixture consisting essentially of about 40.0 to 99.5 weight percent 1-chloro-1,2,2,2-tetrafluoroethane and the remainder being dimethyl ether.
Claim 3
Dependent Claim
27 words
A nonflammable binary azeotropic mixture of claim 1 consisting essentially of about 92.0 to 99.5 weight percent of 1-chloro-1,2,2,2-tetrafluoroethane and 8.0 to 0.5 weight percent dimethyl ether.
Claim 4
Dependent Claim
23 words
A composition of claim 1 consisting essentially of about 83.2 to 90.2 weight percent 1-chloro-1,2,2,2-tetrafluoroethane and 9.8 to 16.8 weight percent dimethyl ether.
Claim 5
Dependent Claim
20 words
A composition of claim 3 consisting essentially of about 86.7 weight percent 1-chloro-1,2,2,2-tetrafluoroethane and about 13.3 weight percent dimethyl ether.
Claim 6
Dependent Claim
20 words
The composition of claim 1, consisting of about 40.0 to 99.5 weight percent 1-chloro-1,2,2,2-tetrafluoroethane and the remainder being dimethyl ether.
Claim 7
Dependent Claim
28 words
The composition of claim 1, wherein if said mixture is fractionally distilled it would produce an azeotrope containing only 1-chloro-1,2,2,2-tetrafluoroethane and dimethyl ether in at least one fraction.
References Cited (Backward Citations)
US3922228A
Cited
US4002573A
Cited
US4062795A
Cited
US4482465A
Cited
US4585577A
Cited
US4595522A
Cited
US4543202A
Cited
US4612133A
Cited
US4783276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |