Appeal No. 1996-0647
Application No. 07/871,401
the examiner (Answer, sentence bridging pages 3-4), "Technical
News" teaches to use “low chlorine multiple” and oxygen
bleaching to reduce the formation of dioxin (page 36, left
column). Low TOCl and AOX contents would have necessarily
followed from the teachings of "Technical News" (Answer, page
7).
Kringstad discloses that the partial replacement of
chlorine with chlorine dioxide and/or applying low chlorine
ratio bleaching in kraft pulps reduces the amount of
chlorinated organic material (pages 63-64). Kringstad teaches
that the amount of TOCl can be reduced to about 2 kg/ton of
pulp by applying the technique of replacing chlorine with
chlorine dioxide, use of low chlorine ratio bleaching, and
fortified alkaline extraction (page 67). Kringstad further
teaches that this process produces kraft pulps with low
amounts of PCDDs and PCDFs (Id.).
For the foregoing reasons, we determine that the examiner
has shown that the prior art "Technical News" and Kringstad
disclose products which reasonably appear to be identical or
only slightly different from the claimed product, regardless
of the method of preparation. Therefore the examiner has
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