Appeal No. 2004-2026
Application No. 09/793,652
According to the appellant (Brief, page 3):
Claims 16-20[,] 22-23, 25 and 28 may be considered to be
grouped as standing or falling together for purposes of
this appeal.
Therefore, we select claim 16 from all of the appealed claims and
determine the propriety of the examiner’s rejection below based on
this claim alone consistent with 37 CFR § 1.192(c)(7)(2003). Claim
16 is reproduced below:
16. A method of treating cellulose pulp comprising the sequential
steps of:
(a) digesting comminuted cellulosic fibrous material to
produce cellulose pulp, and if necessary oxygen
delignifying the pulp, to produce a cellulose pulp with a
kappa number of less than 24;
(b) treating the digested pulp from step (a) in at least one
acid-treatment tower at a consistency of 6-25%, a pH of
between 2-5, and a temperature between 75-130/C, and in
order to prevent the strength properties of the pulp from
being deteriorated, at a retention time t in minutes in
the acid treatment of between 30-300 minutes, wherein the
treatment temperature T in degrees centigrade is
Tmin<T<Tmax in which
in order to decrease the kappa number of the pulp by 2-9
units.
2
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