US PATENT SUBCLASS 501 / 90
.~.~.~ And carbonaceous material
Current as of:
June, 1999
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501 /
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COMPOSITIONS: CERAMIC
1
DF
CERAMIC COMPOSITIONS
{15}
87
DF
.~ Carbide or oxycarbide containing {2}
88
DF
.~.~ Silicon carbide {4}
90
.~.~.~ And carbonaceous material
DEFINITION
Classification: 501/90
And carbonaceous material:
(under subclass 88) Subject matter additionally comprising a material containing free carbon.
(1) Note. The free carbon containing material may be, for example, graphite or tar.