Appeal No. 1999-1267
Application No. 08/755,150
The references relied upon by the examiner as evidence of
obviousness are:
Martin 2,707,151 Apr. 26,
1955
Forkner 3,057,739 Oct. 9,
1962
Williams 3,103,439 Sep. 10,
1963
Benton et al. (Benton) 4,749,578 Jun. 7,
1988
All of the appealed claims stand rejected under 35 U.S.C.
§ 103 as being unpatentable over Benton in view of Martin,
Williams and Forkner.
We refer to the brief and to the answer for a complete
exposition of the opposing viewpoints expressed by the
appellants and by the examiner concerning the above-noted
rejection.
OPINION
For the reasons set forth below, this rejection cannot be
sustained.
Each of the independent claims on appeal requires
adjusting the pH of the fluid mixture to between 7.5 and 9.5.
Regarding this pH range, the examiner points out that Benton
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