US PATENT SUBCLASS 419 / 59
.~.~.~ Hydrocarbon or derivative (e.g., CH4, etc.)

Current as of: June, 1999
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419 /   HD   POWDER METALLURGY PROCESSES

1  DF  POWDER METALLURGY PROCESSES WITH HEATING OR SINTERING {16}
56  DF  .~ Special medium during sintering {1}
57  DF  .~.~ Special atmosphere {3}
59.~.~.~ Hydrocarbon or derivative (e.g., CH4, etc.)

DEFINITION

Classification: 419/59

(under subclass 57) Hydrocarbon or derivative (e.g., ch4, etc.): Processes herein the special atmosphere contains hydrocarbons or substances derived from hydrocarbons other than hydrogen.

(1) Note. The atmosphere may comprise, e.g., methane (CH4) gas, etc.