Compositions – Vaporization – or expansion – refrigeration or heat or energy... – With lubricants – or warning – stabilizing or anti-corrosion...
Reexamination Certificate
2008-04-01
2008-04-01
Hardee, John R. (Department: 1796)
Compositions
Vaporization, or expansion, refrigeration or heat or energy...
With lubricants, or warning, stabilizing or anti-corrosion...
C252S067000
Reexamination Certificate
active
11653680
ABSTRACT:
The present invention relates to compositions for use in refrigeration and air-conditioning systems comprising 1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxybutane and at least one chlorocarbon, alcohol, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, or mixtures thereof. Further, the present invention relates to compositions for use in refrigeration and air-conditioning systems employing a centrifugal compressor comprising 1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxybutane and at least one chlorocarbon, alcohol, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, or mixtures thereof. The compositions of the present invention may be azeotropic or near-azeotropic and are useful in processes for producing cooling or heat or as heat transfer fluids.
REFERENCES:
patent: 5607912 (1997-03-01), Samejima et al.
patent: 5827812 (1998-10-01), Flynn et al.
patent: 5987793 (1999-11-01), Ebine
patent: 1288284 (2003-03-01), None
patent: WO 96/36688 (1996-11-01), None
patent: WO 96/40834 (1996-12-01), None
International Search Report; Date of Mailing: Dec. 20, 2005.
Written Opinion of the International Searching Authority; Date of Mailing: Dec. 20, 2005.
E.I. du Pont de Nemours and Company
Hamby Jane O.
Hardee John R.
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