US PATENT SUBCLASS 501 / 122
.~.~.~ And silicon compound

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}
122.~.~.~ And silicon compound

DEFINITION

Classification: 501/122

And silicon compound:

(under subclass 108) Subject matter additionally comprising a compound of silicon.