US PATENT SUBCLASS 264 / 421
.~.~.~.~ Radio frequency (e.g., 13.56 megahertz, etc.)

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}
419  DF  .~.~.~ Using chemical blowing agent {2}
421.~.~.~.~ Radio frequency (e.g., 13.56 megahertz, etc.)

DEFINITION

Classification: 264/421

Radio frequency (e.g., 13.56 megahertz, etc.):

(under subclass 419) Processes wherein the directly applied energy is identified on the electromagnetic wave spectrum as existing between 150 KHz and extending up to the infrared region.

SEE OR SEARCH THIS CLASS, SUBCLASS:

422, for processes of utilizing radio frequency wave energy to form porous products.

475, for extrusion molding processes utilizing radio frequency wave energy.

491, for processes wherein the energy directly applied is radio frequency wave.