Appeal No. 96-2885
Application No. 08/146,862
This is an appeal from the final rejection of claims 4-
10. Claims 1-3, the other claims remaining in the present
application, stand withdrawn from consideration. Claim 4 is
illustrative:
4. A composition consisting essentially of hydrogen
fluoride in combination with an effective amount of a compound
selected from the group consisting of CC1 CF and CC1 FCF to3 3 2 3
form an azeotrope or azeotrope-like composition with hydrogen
fluoride, said composition containing from about 10 to 27 mole
percent CC1 CF and from about 90 to 73 mole percent of HF or
3 3
from about 35 to 56 mole percent CC1 FCF and from about 65 to
2 3
44 mole percent of HF; said composition (i) including a liquid
phase and a vapor phase with a composition which is
essentially that of said liquid phase, and (ii) having a
boiling point which ranges from about -25EC at 50 kPa when the
composition consists essentially of about 65 mole percent HF
and about 35 mole percent CC1 FCF to about 125EC at 4020 kPa
2 3
when the composition consists essentially of about 44 mole
percent HF and about 56 mole percent CC1 FCF and a boiling
2 3
point which ranges from about 20EC at 140 kPa when the
composition consists essentially of about 90 mole percent HF
and about 10 mole percent CC1 CF to about 150EC at 4750 kPa
3 3
when the composition consists essentially of about 73 mole
percent HF and about 27 mole percent CC1 CF3.
3
In the rejection of the appealed claims, the examiner
relies upon the following references:
Lantz et al. (Lantz) 5,055,624 Oct. 8, 1991
Lee et al. (Lee) 5,196,616 Mar. 23, 1993
(filed Oct. 18, 1991)
-2-
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