Interference No. 103,995 Paper 29
Morel v. Sekhar Page 15
non-reactant substances, which when the body is heated to a sufficient
elevated temperature form the protective coating by reaction sintering and/or
by sintering without reaction (c. 1, l. 64 - c. 2, l. 6).
36. Sekhar ‘513 describes two types of coatings, i.e., micropyretic coatings which
contain combustible materials and non-micropyretic coatings which do not contain any
combustible material (c. 2, ll. 42-50), which can be used alone or in combination (c. 2, ll.
50-51) and are applied as colloidal slurries in one or more layers (c. 2, ll. 51-54; c. 8, ll. 13-
16 and 37-41).
37. The slurry comprises
(1) a colloidal carrier, e.g., colloidal alumina, colloidal ceria, colloidal yttria, colloidal
silica, colloidal zirconia, monoaluminum phosphate, colloidal cerium acetate or mixtures
thereof and
(2) at least one additive selected from
(b) powder additives containing carbides, silicides, borides, nitrides, oxides,
nitrides [sic], carbonitrides, oxynitrides, boric acid and its salts, and combinations
thereof,
(c) metallic particles such as Ni, Pt, Al, Cr or intermetallic particles, e.g.,
NiAl, NiAl CrSi, CrB, etc. or combinations thereof, and/or
3,
(d) micropyretic agents including particles, fibers or foils of Ni, Al, Ti, B, Si,
Nb, C, Cr O , Zr, Ta, TiO , B O , Fe, Mo or combinations (SDEx 3, c. 4, l. 47 - c. 6, l.2 3 2 2 3
23).
38. “It is also possible for the powder additive to be the same as the reaction
product of the micropyretic reaction” (SDEx c. 6, ll. 29-31).
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