Appeal No. 1997-2030
Application 08/400,287
said X-ray image intensifier tube ranging from 58 to 62 mm, and a ratio of the diameter of
the input image to the diameter of the output image ranging from 5 to 7".
On page 5 of the answer, the Examiner states that Grossel teaches a diameter of
an input image of the X-ray image intensifier tube ranging from 229 to 356 mm, a diameter
of output image of said X-ray image intensifier tube ranging from 100 to 152 mm and a
ratio of the diameter of the input image to the diameter of the output image ranging from
1.3 to 4. The Examiner argues that the Appellants have not shown unexpected results and
that the discovery of optimum value for a result effective variable in a known apparatus is
within the skill of the art.
Upon our review of Grossel, we clearly find that Grossel does not teach a diameter
of input image of said X-ray and image intensifier tubes ranging from 305 to 406 mm, a
diameter of the output image of said X-ray intensifier ranging from 58 to 62 mm in a ratio
the diameter of the input image to the diameter to the output image ranging from 5 to 7.
We do agree that Grossel does teach a range for the diameter of the input image of the X-
ray image intensifier tube which does overlap the claimed diameter of the input image of
the X-ray image intensifier tube. However, Grossel does
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