The opinion in support of the decision being entered today was not written
for publication and is not binding precedent of the Board.
Paper No. 22
UNITED STATES PATENT AND TRADEMARK OFFICE
__________
BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
__________
Ex parte HANS BERG
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Appeal No. 2002-0456
Application No. 09/155,995
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HEARD October 24, 2002
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Before SCHEINER, ADAMS and GREEN, Administrative Patent Judges.
SCHEINER, Administrative Patent Judge.
DECISION ON APPEAL
This is a decision on appeal under 35 U.S.C. § 134 from the final rejection of
claims 1-20, all the claims remaining in the application. Claims 1 and 11 are
representative of the subject matter on appeal and read as follows:
1. A process for the production of a porous cross-linked polysaccharide gel,
comprising the following steps:
a) preparing a solution or dispersion of the polysaccharide,
b) adding a bifunctional cross-linking agent having one active site and one
inactive site to the solution or dispersion from step a),
c) reacting hydroxylgroups of the polysaccharide with the active site of the cross-
linking agent,
d) forming a polysaccharide gel,
e) activating the inactive site of the cross-linking agent,
f) reacting the activated site from step e) with hydroxylgroups of the
polysaccharide gel, whereby cross-linking of the gel takes place.
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