Appeal 97-1458
Application 08/329,940
perfluorinated liquid. The preferred compositions
comprise about 80 to about 99.9 wt% of the chlorinated
benzotrifluoride compound and about 0.1 to about 20 wt%
of the perfluorinated liquid as those mixtures are less
expensive. The most preferred compositions comprise
about 95 to about 99.9 wt% chlorinated benzotrifluoride
and about 0.1 to about 5 wt% of the perfluorinated
liquid. An azeotropic mixture that boils between 98 and
104EC lies between about 1 to about 8 wt%
parachlorobenzotrifluoride and about 92 to about 99 wt%
C F . Compositions made with C F NO are miscible in all8 18 5 11
proportions.
7. Further according to the specification (page 5):
The compositions are easily prepared by simply
mixing together the chlorinated benzotrifluoride compound
and the perfluorinated liquid in a miscible proportion.
8. In Example 1, applicants explain (specification,
page 6):
Incremental amounts of various perfluorinated
liquids were added to 20 grams PCBTF [p-
chlorobenzotrifluoride] *** in a glass vial. After each
addition, the mixtures were shaken and visually examined
for miscibility. The additions were continued until a
total of 20 grams of the perfluorinated liquid had been
added to the PCBTF. The process was then reversed by
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