US PATENT SUBCLASS 521 / 54
.~.~.~ Treating a cellular solid polymer by adding a solid polymer or solid polymer-forming composition

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}
53  DF  .~.~ Treating a cellular solid polymer by adding a material thereto which reacts with the polymer or forms a composition therewith, or products of said treating process {2}
54.~.~.~ Treating a cellular solid polymer by adding a solid polymer or solid polymer-forming composition

DEFINITION

Classification: 521/54

Treating a cellular solid polymer by adding a solid polymer or solid polymer-forming composition:

(under subclass 53) Subject matter wherein (1) an additional solid polymer is added to the previously formed cellular polymer, or (2) wherein polymer-forming ingredients are added to the previously formed solid cellular polymer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

50, (9) Note therein, for definition of the terms incorporated by (1) and (2) above.