Appeal No. 1998-0482
Application No. 08/404,908
We refer to the brief and reply brief and to the answer
for a complete exposition of the opposing viewpoints expressed
by the appellants and by the examiner concerning the above
noted rejection.
OPINION
We cannot sustain the rejection before us on this appeal.
It is the examiner’s fundamental position that contact
between the acid filtrate and the final bleached pulp at the
vacuum filter 33 of Peter would result in metals and metal
ions in the acid filtrate liquid being adsorbed into the
bleached pulp as required by the appealed claims. In support
of this position, the examiner relies upon the secondary
reference teachings and in particular the teaching of
Schleinkofer that “[w]hen the acid filtrate is used for shower
on the alkaline pulp from the oxygen or brown stock system,
the metals are either reabsorbed or precipitated” (page 77).
With respect to this last mentioned teaching, the examiner
emphasizes that the final bleached pulp of Peter would
constitute an alkaline pulp. The examiner further emphasizes
that the appellants effect the here claimed adsorption of
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