Interference No. 103,995 Paper 29
Morel v. Sekhar Page 36
1995 Final Rule Notice, 60 Fed. Reg. at 14506; 1173 Off. Gaz. Pat. & Tr. Off. at 51.
In summary, we decline to accept Morel’s urged construction of Sekhar claims 77-
82.
B. Are Sekhar claims 77-82 unpatentable for obviousness over WO
88/03519 in view of Lorkin
Weir
72. WO 88/03519 (hereinafter “Weir”, MDEx 1) describes precursor “coating”
compositions comprising (a) about 15 to 75 wt % titanium diboride, (b) about 10 to 85 wt
% of a silica compound, e.g., colloidal silica, and optionally (c) up to about 60 wt %,
preferably about 5 to 30 wt % of a metal salt which, when oxidized, can supply ions of
silicon, titanium or boron, e.g., silicon carbide, titanium carbide or boron carbide. Upon
firing, these precursor compositions form glass ceramic materials suitable for use at high
temperatures and in chemically harsh environments as protective coatings, hermetic
sealants or simply as articles of manufacture. [MDEx 1, p. 4, ll. 5-20.]
As stated above (fact 45, p. 23), the titanium diboride not only provides a source of
boron but also generates nucleation points to form varying degrees of boro-silicate growth.
73. The silicates form the basis for high temperature resistant glass/crystal
materials (MDEx 1, p. 5, ll. 28-30).
Lorkin
74. Lorkin describes compositions comprising (a) a matrix having a melting point
o
preferably under 1000 C, which is capable of fusing to a furnace electrode to form a
continuous coating of high impermeability in order to reduce attack of the electrode by the
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