after that time.
Those activities that Anderson argues are directly related
to reducing the invention of the count prior to the end of
November 1992 are directed to activities that apply generally to
studying and experimenting with various ways to form Bragg
gratings. Anderson has failed to direct us to sufficient
evidence that would demonstrate that the other activities are
directly related or precursors to reducing the invention to
practice.
For example, Anderson argues that Drs. Erdogan and Mizrahi
worked on studying photosensitivities and grating growth rates
since they did not have a phase mask or knew they would only be
able to obtain an inferior phase mask. Anderson argues that:
The studies of optical fiber photosensitivities were
also proper diligence activity, because the studies
identified fibers with high photosensitivity. The
identification of fibers with high Dhotosensitivities was
relevant to reduction to practice of the count, because,
Drs. Mizrahi and Erdogan, were unsuccessful at obtaining a
phase mask suitable for practicing the count prior to
JanuarV 8, 1993. Anderson Exh. 1031, pars. 31, Record pp.
0273-0274; Anderson Exh. 1032, pars. 18-19, pp. 0285-0286;
Anderson Exh. 1034, pars. 19-21, Record p. 0299-300. The
inventors believed that they might have to use a phase mask
of low QualitV to reduce-to-practice the count. Anderson
Exh. 1032, par. 9, Record p. 0280-0281; Anderson Exh. 1049,
Record p.0821, line 18, to Record p. 0823, line 19. Of
course, they could not be sure of the mask quality prior to
a successful production of a phase mask. Furthermore, the
inventors knew that low mask quality would interfere with
successfully reducing-to-practice the count', if the optical
fiber being written was not sufficiently photosensitive.
Anderson Exh. 1032, par. 9, Record pp, 0280; Anderson Exh.
1049, Record p. 0822, line 1, to p. 0823, line 9. Thus, the
inventors knew that a fiber with high photosensitivity could
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