Appeal No. 1999-0020 Page 2
Application No. 08/641,021
BACKGROUND
The appellant's invention relates to a combination of a furnace and a secondary air
nozzle provided with an adjustable damper blade designed to discharge secondary air into the
furnace in two distinct air patterns so as to direct one stream toward the center of the furnace to
support combustion and a second stream toward the furnace boundary wall to minimize
corrosion and slagging (appellant's specification, page 2). The nozzle housing (10) is mounted,
by means of a pair of U-shaped mounting plates (20) and shafts (24,26), to at least one wall of
the housing for pivotal movement about a horizontal axis. Claim 11, the only independent
claim on appeal, is reproduced in the opinion section of this decision.
The prior art references of record relied upon by the examiner in rejecting the appealed
claims are:
Chadshay 4,425,855 Jan. 17, 1984
Newman 5,461,990 Oct. 31, 1995
The following rejection is before us for review.
Claims 11-13 stand rejected under 35 U.S.C. § 103 as being unpatentable over
Chadshay in view of Newman.
Reference is made to the brief (Paper No. 10) and the final rejection and answer
(Papers No. 8 and 11) for the respective positions of the appellant and the examiner with
regard to the merits of this rejection.
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