US PATENT SUBCLASS 264 / 321
.~.~.~.~ Sponge-like or foamed work

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

239  DF  MECHANICAL SHAPING OR MOLDING TO FORM OR REFORM SHAPED ARTICLE {10}
299  DF  .~ Shaping against forming surface (e.g., casting, die shaping, etc.) {10}
319  DF  .~.~ Applying heat or pressure {6}
320  DF  .~.~.~ Reshaping solid work or introducing solid work into mold cavity {5}
321.~.~.~.~ Sponge-like or foamed work

DEFINITION

Classification: 264/321

(under subclass 320) Processes wherein said work is of a sponge-like or foamed structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41+, for molding or shaping combined with the step of pore forming in situ.

324, for processes for shaping a woven or felted sheet.