US PATENT SUBCLASS 419 / 30
.~ Powder pretreatment (prior to consolidation or sintering)

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

1  DF  POWDER METALLURGY PROCESSES WITH HEATING OR SINTERING {16}
30.~ Powder pretreatment (prior to consolidation or sintering) {6}
31  DF  .~.~> Heat treatment of powder
32  DF  .~.~> Mechanical blending
33  DF  .~.~> Comminuting
34  DF  .~.~> Chemical blending
35  DF  .~.~> Coating
36  DF  .~.~> Addition of fugitive material {1}

DEFINITION

Classification: 419/30

Powder pretreatment (prior consolidation or sintering):

(under subclass 1) Processes which include preliminary significant treatment, preparation or manufacture of the powder or particulate material, prior to any compacting or sintering.

(1) Note. Processes here provide for which in addition include such subsequent operations as provided for below are classified here and cross-referenced to the subclasses below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44, for processes which include a preliminary treatment of a "green body" prior to sintering or consolidation.