US PATENT SUBCLASS 419 / 22
.~.~.~ Copper oxide
Current as of:
June, 1999
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419 /
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POWDER METALLURGY PROCESSES
1
DF
POWDER METALLURGY PROCESSES WITH HEATING OR SINTERING
{16}
10
DF
.~ Metal and nonmetal in final product {5}
19
DF
.~.~ Oxide containing {3}
22
.~.~.~ Copper oxide
DEFINITION
Classification: 419/22
Copper oxide:
(under subclass 19) Processes in which the nonmetal is a binary compound of oxygen and copper.