Appeal No. 2004-1154
Application No. 09/247,219
less than 80% by total weight of solids, wherein
said carbon dioxide forms carbonic acid (H2CO3) in
the solution/dispersion and lowers the pH below
about 5.5;
b) holding the pressurized solution/dispersion at a
pressure of from about 400 to 800 psi for at least
1 minute in order to precipitate the vegetable
protein;
c) gradually depressurizing the solution/dispersion
in order to maintain particle size of the protein
precipitate;
d) separating said protein precipitate from said
solution/dispersion; and
e) recovering a solid protein precipitate having a
concentration of protein greater than 85% by total
weight of solids in said precipitate.
The examiner relies upon the following references as
evidence of obviousness:
Dahlstrom et al. (Dahlstrom) 5,006,349 Apr. 09, 1991
Tomasula 5,432,265 Jul. 11, 1995
Appellant’s claimed invention is directed to a process for
producing a concentrate of vegetable protein from a solution or
dispersion of a source of the vegetable protein. The process
entails applying carbon dioxide at high pressure to the
solution/dispersion, holding the pressure for at least one minute
and gradually depressurizing the system in order to maintain the
particle size of the protein precipitate. It is recognized by
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