Appeal No. 1997-1732
Application No. 08/236,895
through 25, 27, 32 through 34, 36, 37 and 40, have been
indicated by the
examiner as being allowable.
The subject matter on appeal relates to a method of
treating a waste fluid to recover a desired solvent which
includes the step of adding a second or surrogate solvent to
the waste fluid to maintain flowability or to prevent
coalescing of the waste fluid. This appealed subject matter
is adequately illustrated by independent claim 26 which reads
as follows:
26. A method for treating a waste fluid comprising an
amount of a desired solvent to recover at least a portion of
the amount of the desired solvent, the method comprising the
steps of:
removing the portion of the amount of the desired solvent
from the waste fluid; and
adding a surrogate solvent to the waste fluid to prevent
the waste fluid from coalescing.
The references relied upon by the examiner as evidence of
obviousness are:
Sabatka 4,204,913 May 27, 1980
Nelson 4,666,562 May 19, 1987
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