Interference No. 103,995 Paper 29
Morel v. Sekhar Page 26
ignited to initiate a self-sustaining micropyretic reaction in the dried slurry,
along a combustion front, to produce condensed matter forming a coating
adherent to the surface of the substrate and protecting it (SDEx 2, c. 5, ll. 31-
38).
49. Sekhar ‘476 defines a “refractory coating or material ... [as] a material, whether
carbonaceous, ceramic, or metallic, which can withstand high temperatures” (SDEx 2, c. 5,
ll. 12-16).
50. The micropyretic slurry comprises (a) particulate reactants, (b) optional
particulate or fibrous fillers, and (c) a carrier (SDEx 2, c. 11, ll. 53-59; c. 13, ll. 19-24).
51. The carrier is usually a colloidal carrier, i.e., colloidal alumina, colloidal silica,
colloidal yttria or colloidal monoaluminum phosphate (SDEx 2, c. 11, ll. 60-65).
52. The colloidal carrier “assist[s] in moderating the reaction and considerably
improve[s] the properties of the coating” (SDEx 2, c. 11, ll. 60-65).
53. The particulate reactants
comprise components to produce, upon reaction, borides, silicides, nitrides
and aluminides, and mixtures thereof, of titanium, zirconium, hafnium,
vanadium, silicon, niobium and tantalum, nickel, molybdenum, chromium and
iron. Mostly, these reactants will be in the elemental form. ...
Titanium diboride ...[is an example of] the final material, starting from
elemental particulate titanium and boron in equimolar proportions in the
micropyretic reaction slurry. [SDEx 2, c. 12, ll. 3-19.]
54. “The refractory borides of titanium, zirconium, hafnium, vanadium, niobium and
tantalum, or combinations thereof ... are preferred” (SDEx 2, c. 11, ll. 47-50).
55. Optional non-reactant fillers include pre-formed particulates or fibers of the
desired refractory material being produced, e.g., pre-formed particulate titanium diboride
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