US5061394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 14:34
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.
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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) | 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 |