Appeal No. 2002-1596
Application No. 09/284,701
trioxide and nitrosyl sulfuric acid (Brief, page 2).1 A copy of
the claims on appeal may be found in the Appendix to appellants’
Brief.
In addition to the admitted prior art found on pages 1-2 of
appellants’ specification, the examiner has relied upon the
following references as evidence of obviousness:
Drechsel et al. (Drechsel ‘586) 3,525,586 Aug. 25, 1970
Drechsel et al. (Drechsel ‘900) 3,656,900 Apr. 18, 1972
The claims on appeal stand rejected under 35 U.S.C. § 103(a)
as unpatentable over appellants’ “description of the prior art set
forth on pg.s [sic] 1 and 2 in the specification” and Drechsel
‘586, further in view of Drechsel ‘900 (Answer, page 4). We
reverse the rejection on appeal essentially for the reasons stated
in the Brief, Reply Brief, and those reasons set forth below.
OPINION
The examiner finds that Drechsel ‘586 describes a process for
producing sulfuric acid from sulfur trioxide containing gas leaving
a catalytic oxidizer, where the sulfur trioxide and steam
containing gas is contacted with sulfuric acid in an absorber 33
after the gas has been cooled to a temperature of 130°C. in a heat
1All reference to and citation from the Brief refers to the
Corrected Appeal Brief dated Mar. 5, 2002, Paper No. 21.
2
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