US PATENT SUBCLASS 264 / 416
.~.~.~ Using liquid to gas blowing agent

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

405  DF  DIRECT APPLICATION OF ELECTRICAL OR WAVE ENERGY TO WORK (E.G., ELECTROMAGNETIC WAVE, PARTICULATE, MAGNETIC, INDUCTION HEAT, SONIC, ELECTROSTATIC ENERGY, ETC.) {26}
413  DF  .~ Producing or treating porous product {5}
415  DF  .~.~ Including in situ (e.g., foaming) {3}
416.~.~.~ Using liquid to gas blowing agent {2}
417  DF  .~.~.~.~> Microwave (e.g., 2.45 gigahertz, etc.)
418  DF  .~.~.~.~> Radio frequency (e.g., 13.56 megahertz, etc.)

DEFINITION

Classification: 264/416

Using liquid to gas blowing agent:

(under subclass 415) Processes in which the pores or voids are formed by using a liquid blowing agent whose state changes from liquid to gas (i.e., vaporization of a liquid incorporated into the molding material).

SEE OR SEARCH THIS CLASS, SUBCLASS:

53, for processes in which voids are formed by a liquid to gas change of state without using directly applied electrical or wave energy.