Appeal No. 1997-0689
Application No. 08/047,238
how the movable windowpane would be mounted to rotate in this
manner. Further, Figure 13, which was proposed to illustrate
claim 23, seems to suggest that the rotation is actually about
the center of the movable windowpane. Yet, it is unclear how
such a rotation would make the movable windowpane "selectively
juxtaposable in or out of optical series with said fixed
diffraction grating windowpane." In addition, the examiner
has identified other possible meanings for "rotational
repositioning" (Answer, pages 5-6), thereby further suggesting
a need for an explicit disclosure of what is meant by
"rotational repositioning." Since there is no such
disclosure, we must affirm the rejection of claim 23 as being
nonenabled.
As to the obviousness rejections, Zhang is directed to a
window using two polarizers, one fixed and one movable. The
polarizers create an optical shade by passing or blocking
incoming light depending on the relative positions of the two
polarizers. Gerritsen II uses diffraction gratings in a
window
to focus light in a particular direction regardless of the
angle of incidence. The examiner states (Answer, page 8) that
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