Appeal No. 1998-0482
Application No. 08/404,908
ions from a pulp prior to bleaching and adsorbing the metal
and metal ions into the pulp after bleaching. Further details
of this appealed subject matter are set forth in
representative independent claim 1 which reads as follows:
1. A process for bleaching pulp comprising the steps of:
separating from a delignified pulp metals and metal ions
to a flow of liquid;
bleaching the pulp; and
contacting the flow of liquid containing metals and metal
ions to the bleached pulp under conditions whereby the metals
and metal ions are adsorbed into the bleached pulp to thereby
remove said metals and metal ions from the flow of liquid.
The references set forth below are relied upon by the
examiner as evidence of obviousness:
Peter et al. (Peter) 5,145,557 Sep. 8,
1992
Lundgren et al. (Lundgren)(EP) 0 402 335 Dec. 12,
1990
Schleinkofer, “Overview of a Chlorine-Free Bleaching Process,”
Seminar Notes of the Technical Association of the Pulp and
Paper Industry, Tappi Press, pp. 75-78, 1981.
All of the claims on appeal are rejected under 35 U.S.C.
§ 103 as being unpatentable over Peter in view of Schleinkofer
and Lundgren.
2
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