US PATENT SUBCLASS 425 / 817 C
.~ Continuous

Current as of: June, 1999
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425 /   HD   PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS

817 R  DF  MEANS MOLDING PORE FORMABLE MATERIAL {1}
817 C.~ Continuous

Unofficial Alpha Subclasses: R C

DEFINITION

Classification: 425/817

Apparatus for shaping material in which pores or voids are formed during the material handling or shaping operations.

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4, for mechanical means to form or expand pores in the material.

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264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

41+, for the process of shaping plastic material including the step of forming pores in situ.