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Patent US5248433A successfully refreshed from Google Patents.
US5248433A
Expired / Lapsed
US
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Binary azeotropic mixtures of octafluoropropane and fluoroethane
Assignee: EIDP Inc
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Filing: 1992-04-30
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Granted: 1993-09-28
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Expires: 2012-04-30
Abstract
Abstract Constant boiling azeotropic or azeotrope-like mixtures of octafluoropropane and fluoroethane are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
Inventors
- 👤 Vinci M. Felix
- 👤 Mark B. Shiflett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:45
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/144; C08J9/146; A; A62; A62D; A62D1/00; A62D1/0028; A62D1/0057; C08J2207/00; C08J2207/04; Y; Y10; Y10S; Y10S264/00; Y10S264/05
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
28 words
A substantially constant boiling composition consisting essentially of 69-84 weight percent octafluoropropane and 16-31 weight percent fluoroethane which has a vapor pressure of 190±6 psia at 25° C.
Claim 2
Dependent Claim
28 words
A substantially constant boiling composition consisting essentially of 69-84 weight percent octafluoropropane and 16-31 weight percent fluoroethane which has a vapor pressure of 190±6 psia at 25° C.
Claim 3
Dependent Claim
30 words
A substantially constant boiling composition of claim 1 consisting essentially of 75-79 weight percent octafluoropropane and 21-25 weight percent fluoroethane which has a vapor pressure of 194±2 at 25° C.
Claim 4
Dependent Claim
18 words
A substantially constant boiling composition of claim 1 having a vapor pressure of 4953 torr at 0° C.
Claim 5
Dependent Claim
27 words
A process for producing refrigeration which comprises condensing the composition of claim 1 and thereafter evaporating said composition in the vicinity of a body to be cooled.
Claim 6
Dependent Claim
27 words
A process for producing heat which comprises condensing the composition of claim 1 in the vicinity of a body to be heated and thereafter evaporating said composition.
Claim 7
Dependent Claim
27 words
A process for producing refrigeration which comprises condensing the composition of claim 2 and thereafter evaporating said composition in the vicinity of a body to be cooled.
Claim 8
Dependent Claim
27 words
A process for producing heat which comprises condensing the composition of claim 2 in the vicinity of a body to be heated and thereafter evaporating said composition.
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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) | 1996-09-27 | 1997-03-29 | 1997-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-27 | 2001-03-29 | 2001-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-27 | 2005-03-29 | 2005-09-28 | $7700.00 | Window Closed / Lapsed |