of a coal-derived material in a dipolar, aprotic
solvent, the coal-derived material having a
composition, free of solvent, of 70 to 91% by mass
of carbon, 2 to 6% by mass of hydrogen and 3 to 20%
by mass of oxygen, and silicon oxide in particulate
form, causing the coal- derived material, in
solution or as a precipitate, and the silicon oxide
in particulate form to interact, removing the
solvent to form a precursor and heat treating the
precursor to produce the compound.
24. A method of making a compound selected from the
group consisting of silicon carbide and silicon
nitride comprising the steps of providing a solution
of a coal-derived material in a dipolar, aprotic
solvent, the coal-derived material having a
composition, free of solvent, of 70 to 91 percent by
mass carbon, 2 to 6 percent by mass of hydrogen and
3 to 20 percent by mass of oxygen, and a source of
silicon oxide in solution, adding the source of
silicon oxide solution to the coal-derived material
solution to cause a co-precipitate of the coal-
derived material and a silicon oxide precursor to
form, removing the solvent to form a precursor of
the compound and heat treating the precursor of the
compound to produce the compound.
The prior art references of record relied upon by
the examiner in rejecting the appealed claims are:
Yamaguchii et al. (Yamaguchi) 4,396,587 Aug. 02,
1983
Mueller 4,541,833 Sep. 17, 1985
Reichl 4,762,528 Aug. 09, 1988
Morgan 5,120,430 Jun. 09, 1992
Claims 17, 19, 21, 22, and 24 stand rejected under
2
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