Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Reexamination Certificate
2002-06-03
2004-02-03
Webb, Gregory E. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
C510S177000, C510S273000, C510S365000, C510S407000, C510S410000, C510S417000
Reexamination Certificate
active
06686326
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to novel compositions comprising fluorocarbons, hydrocarbons and water.
BACKGROUND
Fluorocarbon based fluids have found widespread use in industry in a number of applications, including as refrigerants, aerosol propellants, blowing agents, heat transfer media, and gaseous dielectrics. Because of the suspected environmental problems associated with the use of some of these fluids, it is desirable to use fluids having low or even zero ozone depletion potential, such as hydrofluorocarbons (“HFC's”).
Thus, the use of fluids that do not contain chlorofluorocarbons (“CFCs”) or hydrochlorofluorocarbons (“HCFCs”) is desirable. Additionally, it is known that the use of single component fluids or azeotropic mixtures, which mixtures do not fractionate on boiling and evaporation, is desirable. However, the identification of new, environmentally safe, non-fractionating mixtures is complicated due to the fact that azeotrope formation is not readily predictable.
The art continually is seeking new fluorocarbon based mixtures that offer alternatives to, and are considered environmentally safer substitutes for, CFC's and HCFCs. Of particular interest are combinations or mixtures containing a fluorocarbon and a non-fluorocarbon, both of low or no ozone depletion potentials. Such mixtures are the subject of this invention. As used herein, the term fluorocarbon includes CFCs and HCFCs.
REFERENCES:
patent: 2834748 (1958-05-01), Bailey et al.
patent: 2846458 (1958-08-01), Haluska
patent: 2917480 (1959-12-01), Bailey et al.
patent: 3966726 (1976-06-01), Toth et al.
patent: 4975156 (1990-12-01), Wismer
patent: 5268120 (1993-12-01), Michaud
patent: 5268121 (1993-12-01), Michaud
patent: 6365566 (2002-04-01), Bogdan et al.
Bogdan Mary C.
Cook Kane D.
Knopeck Gary M.
Pham Hang T.
Singh Rajiv R.
Szuch Colleen D.
Webb Gregory E.
LandOfFree
Azeotrope-like compositions or pentafluorobutane does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Azeotrope-like compositions or pentafluorobutane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Azeotrope-like compositions or pentafluorobutane will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3298157