US PATENT SUBCLASS 501 / 120
.~.~.~.~.~ Spinel or other aluminate


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

1  DF  CERAMIC COMPOSITIONS {15}
94  DF  .~ Refractory {8}
108  DF  .~.~ Magnesium compound containing {7}
118  DF  .~.~.~ And aluminum compound {1}
119  DF  .~.~.~.~ Aluminum compound other than clay {1}
120.~.~.~.~.~ Spinel or other aluminate


DEFINITION

Classification: 501/120

Spinel or other aluminate:

(under subclass 119) Subject matter wherein the aluminum compound is spinel (MgAl2[end subscrpt]O4) or another aluminate.