THIS OPINION WAS NOT WRITTEN FOR PUBLICATION
The opinion in support of the decision being entered today
(1) was not written for publication in a law journal and
(2) is not binding precedent of the Board.
Paper No. 24
UNITED STATES PATENT AND TRADEMARK OFFICE
_______________
BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
_______________
Ex parte TED Y. TSAI
______________
Appeal No. 95-0578
Application 07/843,8341
_______________
HEARD: September 18, 1997
_______________
Before JOHN D. SMITH, WARREN and WALTZ, Administrative Patent
Judges.
WARREN, Administrative Patent Judge.
Decision on Appeal
This is an appeal under 35 U.S.C. ' 134 from the decision of
the examiner finally rejecting claims 1 through 5.
The claimed method is an improvement in the delignification
of digested chemical cellulosic pulps wherein following
digestion, the pulp is washed with water which is essentially
free of dioxins or dioxin precursors in the amount of between
about 2 and about 4 tons per ton of pulp to establish a
consistency of the pulp at between about 15% and about 40%, and
then subjected to the initial chlorination step which utilizes
gaseous chlorine dioxide, gaseous chlorine or a mixture thereof.
The references relied on by the examiner are:
1 Application for patent filed February 28, 1992.
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