Claims
- 1. A substantially constant boiling mixture consisting essentially of a substantially constant boiling composition consisting of 5-90 weight percent pentafluoroethane, 5-59 weight percent difluoromethane, and 5-35 weight percent 1,1,1,2-tetrafluoroethane having a vapor pressure of about 186 to about 227 psia at 23.8 .degree. C., and wherein the vapor pressure changes less than about 10% after leakage of 50% of the initial mixture.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation of application Ser. No. 08/128,435 filed on Sep. 30, 1993, now abandoned, which is a continuation-in-part of U.S. application Ser. No. 07/931,371 filed on Aug. 18, 1992, abandoned, which is a continuation-in- part of U.S. application Ser. No. 07/649,356 filed on Feb. 1, 1991, now U.S. Pat. No. 5,185,094 granted Feb. 9, 1993, which is a continuation-in-part of U.S. application Ser. No. 07/628,00 filed on Dec. 17, 1990, abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0430169 |
Jun 1991 |
EPX |
0451692 |
Oct 1991 |
EPX |
64-79288 |
Mar 1989 |
JPX |
1-108291 |
Apr 1989 |
JPX |
Non-Patent Literature Citations (3)
Entry |
McLinden & Didion's article "Quest for Alternatives" (ASHRAE Journal, Dec. '87). |
Vinyard, Sand & Statt's article "Selection of Ozone-Safe, Nonazeotropic Refrigerant Mixtures for Capacity Modulation in Residential Heat Pumps" (ASHRAE Transactions 1989, vol. 95, Part 1) no month available. |
Extract fr.OakRidge Nat.Lab. "Environmental, Health, and CFC Substitution Aspects of the Ozone Depletion Issue", Apr. 1989. |
Continuations (1)
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Number |
Date |
Country |
Parent |
128435 |
Sep 1993 |
|
Continuation in Parts (3)
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Number |
Date |
Country |
Parent |
931371 |
Aug 1992 |
|
Parent |
649356 |
Feb 1991 |
|
Parent |
628000 |
Dec 1990 |
|