US PATENT SUBCLASS 264 / 53
.~.~ Liquid to gas phase change

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

41  DF  PORE FORMING IN SITU (E.G., FOAMING, ETC.) {6}
51  DF  .~ By gas forming or expanding {3}
53.~.~ Liquid to gas phase change

DEFINITION

Classification: 264/53

(under subclass 51) Processes in which the voids are formed by a liquid to gas change of state, i.e., vaporization of a liquid incorporated into the molding material.