US PATENT SUBCLASS 501 / 7
.~.~.~.~ Lithium aluminosilicate (e.g., spodumeme, eucryptite, petalite, 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}
6  DF  .~.~.~ Alkali metal aluminosilicate crystalline phase {1}
7.~.~.~.~ Lithium aluminosilicate (e.g., spodumeme, eucryptite, petalite, etc.)

DEFINITION

Classification: 501/7

Lithium aluminosilicate (e.g., spodumene, eucryptite, petalite, etc.):

(under subclass 6) Compositions in which the alkali metal aluminosilicate comprises a lithium aluminosilicate.

(1) Note. The aluminosilicate may be, e.g., spodumene (Li, Na)2Al2[end subscrpt]Si4O12[end subscrpt]), eucryptite (LiAlSiO4), petalite (Li2O.Al2[end subscrpt]O3.8[end subscrpt]SiO2), etc.