US PATENT SUBCLASS 501 / 9
.~.~.~.~ Magnesium aluminosilicate (e.g., cordierite, etc.)

Current as of: June, 1999
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501 /   HD   COMPOSITIONS: CERAMIC

1  DF  CERAMIC COMPOSITIONS {15}
2  DF  .~ Devitrified glass-ceramics {4}
5  DF  .~.~ Binary, ternary, quaternary, etc., metal silicate crystalline phase (e.g., mullite, diopside, sphene, plagioclase, slagcerams free of alumina, etc.) {2}
8  DF  .~.~.~ Divalent metal oxide aluminosilicate crystalline phase (e.g., anorthite, slagcerams, etc.) {1}
9.~.~.~.~ Magnesium aluminosilicate (e.g., cordierite, etc.)

DEFINITION

Classification: 501/9

Magnesium aluminosilicate (e.g., cordierite, etc.):

(under subclass 8) Compositions in which the silicate comprises a magnesium aluminosilicate.

(1) Note. The silicate may be, e.g., cordierite (Mg4Al8[end

subscrpt]O6(SiO3[end subscrpt])10, etc.