US PATENT SUBCLASS 501 / 103
.~.~.~ Zirconium oxide

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

1  DF  CERAMIC COMPOSITIONS {15}
94  DF  .~ Refractory {8}
102  DF  .~.~ Zirconium compound containing {2}
103.~.~.~ Zirconium oxide {2}
104  DF  .~.~.~.~> And alkaline earth metal or magnesium compound
105  DF  .~.~.~.~> And aluminum compound (e.g., clay, aluminum oxide, etc.)

DEFINITION

Classification: 501/103

Zirconium oxide:

(under subclass 102) Subject matter comprising an oxide of zirconium.

(1) Note. The zirconium oxide is frequently disclosed to be ZrO2.