US PATENT SUBCLASS 521 / 53
.~.~ 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

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~ 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  DF  .~.~.~> Treating a cellular solid polymer by adding a solid polymer or solid polymer-forming composition
55  DF  .~.~.~> Treating a cellular solid polymer by adding a material thereto which forms a composition therewith

DEFINITION

Classification: 521/53

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:

(under subclass 50) Subject matter wherein a previously formed solid cellular polymer is treated with a material so as to form a desired composition therewith or so as to chemically modify the cellular product by a change in chemical bonds therein.

(1) Note. Excluded from this subclass and the indented subclasses thereunder is the addition of a foaming agent to a partially expanded product.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56+, for the addition of a foaming agent to a partially expanded bead.

134, through 189, for processes of purifying a cellular product by the addition of material thereto or for processes of treating with a material wherein no chemical reaction with the cellular product or desired composition with the cellular product is produced (e.g., contacting with a particular drying gas, etc.).