US PATENT SUBCLASS 501 / 71
.~.~.~.~.~.~.~ And chromium, nickel, or cobalt

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}
68  DF  .~.~.~.~ And aluminum or iron compound {1}
69  DF  .~.~.~.~.~ And divalent metal oxide (e.g., oxides of zinc, cadmium, beryllium, alkaline earth metal, magnesium, etc.) {1}
70  DF  .~.~.~.~.~.~ Calcium oxide containing {1}
71.~.~.~.~.~.~.~ And chromium, nickel, or cobalt

DEFINITION

Classification: 501/71

And chromium, nickel, or cobalt:

(under subclass 70) Subject matter wherein the composition further includes chromium, nickel, or cobalt or a compound of one of those elements.

(1) Note. The compositions classified herein are typically colored glasses or glasses which selectively absorb light.

SEE OR SEARCH THIS CLASS, SUBCLASS:

70, for similar compositions containing oxides of metals other than chromium, nickel, or cobalt.