Appeal No. 98-0358
Application 08/660,719
The overall disclosure of the Sheets patent makes it
quite evident to us that, at the time of appellants’
invention, screens were well known to those having ordinary
skill in the art for the emission control of flames. More
particularly, as portrayed in Figure 1 of Sheets, akin to the
showing in appellants’ Figure 3, a screen 30 is located in a
flame. Like the examiner (answer, page 5), we appreciate that
those having ordinary skill in the art would have fairly
understood that the screen 30 of Sheets
would be supported in use by some appropriate structure for
positioning in the flame. The reference to mounting flanges
for a screen in Sheets (column 1, lines 54 through 58) clearly
provides support for the latter viewpoint. Further, the
patent to Kirkpatrick (column 5, line 53 to column 6, line 6)
addition-ally buttresses the aforementioned latter assessment
by clearly revealing the knowledge in the art of providing an
appropriate support member for the support of a screen within
a flame (Fig. 3 or Fig. 5).
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