Interference No. 103,995 Paper 29
Morel v. Sekhar Page 27
(SDEx 2, c. 12, ll. 24-28).
56. Refractory oxycompounds, e.g. alumina or oxides, nitrides, carbides, silicides,
aluminides of silicon may also be present in the slurry (SDEx 2, c. 8, ll. 41-44).
57. Example 1 describes micropyretic slurries containing 1 to 2 g of equimolar
elemental titanium and boron powder per ml of carriers containing 0-50 v/v % colloidal
silica and 100-50 v/v % monoaluminum phosphate. The optimum carrier was around 25-
40% colloidal silica and 75-60% monoaluminum phosphate. The silica content could be
increased to about 50% by decreasing the coating thickness, by applying multiple layers
and by controlling the drying rate and temperature and humidity of the atmosphere. The
strength of the end product decreased with lower amounts of silica. (SDEx 2, c. 21, ll. 13-
41.)
58. Example 11 describes a micropyretic slurry containing (a) 11.2 g particulate Ti,
4.8 g amorphous particulate boron and (b) 4 g particulate preformed TiB in (c) 5 ml of a
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carrier which was 14.3 v/v% colloidal alumina, 57.1 v/v% colloidal yttria and 28 v/v %
polyurethane (SDEx 2, c. 23, ll. 54-65).
59. Example 13 used the same particulate mixture as Example 11 but the carrier
was 5 ml of 25 v/v% colloidal silica and 15 ml of 75 v/v% monoaluminum phosphate (SDEx
2, c. 24, ll 57-60).
60. Examples 11 and 12 also describe sublayers, i.e., base layers, comprising 25
g TiB in 10 ml of colloidal alumina (SDEx 2, c. 23, ll. 47-51 and c. 24, ll. 19-25).
2
61. Application in multiple layers is said to improve the pore size, distribution and
imperviousness of the end product (SDEx 2, c. 13, l. 48 - c. 14, l. 4).
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