US PATENT SUBCLASS 501 / 62
.~.~.~.~.~ And aluminum

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

1  DF  CERAMIC COMPOSITIONS {15}
11  DF  .~ Glass compositions, compositions containing glass other than those wherein glass is a bonding agent, or glass batch forming compositions {11}
53  DF  .~.~ Silica containing {3}
55  DF  .~.~.~ 40 percent - 90 percent by weight silica {7}
60  DF  .~.~.~.~ And lead {2}
62.~.~.~.~.~ And aluminum

DEFINITION

Classification: 501/62

And aluminum:

(under subclass 60) Compositions additionally containing aluminum or an aluminum compound.