Patent Interference No. 103,812
chain and the the [sic] carboxylic acid group on the the [sic] compound labeled
"UV acid" on the attached page.
The invention disclosure letter neither identifies the "UV acid" nor the polycarbonate
resin composition. Although reference is made to "the compound labeled 'UV acid' on the
attached page" and "attachments" illustrating the test data or reduction to practice, those
attachments were not provided by Rosenquist.
To the extent that the letter does discuss the use of a carboxylic acid group as an
endcapping agent for a polycarbonate resin, the count requires the endcapping agent to be
chemically bound to the condensation product by an ester linkage through the acid substituent of
the phenolic substituent of the endcapping molecule. See Rosenquist patent claim 1. The letter
fails to indicate that an endcapped polycarbonate resin having this ester linkage was formed. See
the second page of RX 9 ("Three routes [for making endcapped resins] are under investigation . .
. . Each of these routes should yield resin with end groups of the proposed structure."). In fact,
the letter fails to establish that the "UV acid" endcapper was even made. See the third page of
RX 9 (the initial record of attempting to prepare the "UV acid" from commercially available
Tinuvin 840, with the stated intention of reacting it with polycarbonate resin, is in a notebook
dated June 21 and 23, 1992; the work was suspended but later resumed, apparently in July 1993).
In sum, the evidence of record, including the invention disclosure letter, fails to establish
that an endcapped polycarbonate resin was produced according to the process of the count.
Therefore, the letter cannot serve as a contemporaneous recognition and appreciation of that fact.
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