US PATENT SUBCLASS 521 / 80
.~.~.~ Including solid polymer formation in or during extruding step

Current as of: June, 1999
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521 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
50  DF  .~ CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. {27}
79  DF  .~.~ Extruding a solid polymer containing material to form a cellular product {2}
80.~.~.~ Including solid polymer formation in or during extruding step

DEFINITION

Classification: 521/80

Including solid polymer formation in or during extruding step:

(under subclass 79) Subject matter wherein a solid polymer is formed during the extruding step.

(1) Note. Solid polymer formation does not include cross-linking or vulcanizing of a previously formed solid polymer.