US PATENT SUBCLASS 501 / 8
.~.~.~ Divalent metal oxide aluminosilicate crystalline phase (e.g., anorthite, slagcerams, 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.~.~.~ Divalent metal oxide aluminosilicate crystalline phase (e.g., anorthite, slagcerams, etc.) {1}
9  DF  .~.~.~.~> Magnesium aluminosilicate (e.g., cordierite, etc.)

DEFINITION

Classification: 501/8

Divalent metal oxide aluminosilicate crystalline phase (e.g., anorthite, slagcerams, etc.):

(under subclass 5) Compositions in which the silicate comprises a divalent metal oxide aluminosilicate.

(1) Note. The silicate may be an aluminosilicate of an alkaline earth metal, magnesium, zinc, or zirconium, e.g., anorthite (CaAl2Si2[end subscrpt]O3), a slagceram, etc.