Appeal No. 1998-2354
Application 08/054,588
Paper Industry 100, 101, 158 (Miller Freeman Publications
1979).
THE REJECTIONS
The claims stand rejected under 35 U.S.C. § 103 as
follows: claims 1 and 7-12 over Tsai in view of Edlund, and
claims 8 and 9 over Tsai in view of Edlund and Lavigne.
OPINION
We reverse the aforementioned rejections.
Each of the appellant’s independent claims requires using
gas pressure from an initial gaseous bleaching stage to
transport medium consistency pulp to another location.1
Tsai discloses contacting pulp, having a consistency of
about 11% to 45%, in a mixer with about 0.2% to 0.5% ozone
(based on oven dried pulp) contained in an ozone/oxygen
mixture which is about 5 vol% to about 10 vol% ozone, at a
pressure of about 60 and 100 psig (col. 2, lines 12-31). The
ozone is consumed through chemical reaction in the mixer (col.
3, lines 56-58). The pulp, containing oxygen, is conveyed to
a second mixer (col. 3, lines 63-64). The pulp optionally may
1 The appellant argues that medium consistency pulp is about 9-18% oven-dry consistency
(brief, pages 6-7), and the examiner does not challenge this definition.
3
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