Appeal No. 1997-0183
Application 08/206,623
According to appellants, the invention is directed to a
method of making a catalyst and the catalyst product useful in
the reaction of sodium chlorite to produce chlorine dioxide,
wherein the outside edge of the catalyst support is
impregnated with palladium or another platinum group metal and
the catalyst support is modified by a Group IA carbonate,
Group IIA carbonate, or MgO (Brief, pages 2-3). Illustrative
claim 1 is reproduced below:
1. A catalyst having an exterior surface comprising
palladium for producing chlorine dioxide, consisting
essentially of a catalyst support selected from the group
consisting of (a) a support modified by a Group IA carbonate
salt or a Group IIA carbonate salt or MgO and (b) a support
consisting of a Group IA carbonate salt or a Group IIA
carbonate salt or MgO, wherein the exterior surface of said
catalyst support is impregnated with palladium or palladium
and another platinum group metal or palladium and a Group IB
metal.
The examiner has relied upon the following reference as
evidence of obviousness:
Kaiser 3,974,102 Aug. 10, 1976
Claims 1 through 18 stand rejected under 35 U.S.C. § 103
as unpatentable over Kaiser (Answer, page 3). We reverse the
examiner’s decision for reasons which follow.
OPINION
2
Page: Previous 1 2 3 4 5 6 7 8 Next
Last modified: November 3, 2007