Appeal 2007-0650
Application 10/808,264
enablement. Keller includes the following guidance on how to
synthesize the resins:
The resins of the present invention are obtained by
heating a bisorthodinitrile of the general formula:
wherein x is an integer from 1 to 10 and the phenyl
groups are attached at the meta or para position. The
bisorthodinitriles are prepared by a nucleophilic
substitution of the nitrosubstituent of 4-nitrophthalonitrile
with an aromatic diol. The aromatic diols are easily
prepared by an Ullman ether synthesis. Further
discussion of this type of synthesis can be found in
Williams, A. L. et al. Solvent-Assisted Ullman Ether
Synthesis. Reactions of Dihydric Phenols. In Journal of
Organic Chemistry 32: p. 2501-05. August 1967 and in
Hammann, W. C. et al. Synthesis of Seven New
Polyphenyl Ethers. In Journal of Chem. and Eng. Data
15(2): p. 352-5. 1970.
(Keller, col. 3, l. 56 to col. 4, l. 8).
As shown above, Keller refers to Ullman ether synthesis
generally as useful for synthesizing the aromatic diols. These diols
are used to form the oligomers and resins containing the polyaromatic
ethers. Keller further cites two references as discussing this type of
synthesis, Williams and Hammann. In arguing that Keller does not
enable the synthesis, Appellants argue that neither Keller nor
Williams nor Hammann discloses synthesis of aromatic diols where x
is 7 or above (Br. 3).
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