US PATENT SUBCLASS 501 / 110
.~.~.~.~ And iron or chromium 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}
109  DF  .~.~.~ With organic material in starting mixture {1}
110.~.~.~.~ And iron or chromium compound

DEFINITION

Classification: 501/110

And iron or chromium compound:

(under subclass 109) Subject matter additionally comprising a compound of iron or chromium.