US PATENT SUBCLASS 528 / 490
.~.~ Contacting with specified element or with specified inorganic compound other than water, elemental nitrogen, air and the inert gases (Group VIII A)

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

Internet Version by PATENTEC © 1999      Terms of Use


528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
480  DF  .~ TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT {14}
490.~.~ Contacting with specified element or with specified inorganic compound other than water, elemental nitrogen, air and the inert gases (Group VIII A)

DEFINITION

Classification: 528/490

(under subclass 480) Processes wherein a polymer or polymer-containing material is contacted with a material which is a free element or an inorganic compound, which materials are other than air, water, N, and the inert gases (Group VIIIA) or mixtures composed solely of these

materials.

SEE OR SEARCH THIS CLASS, SUBCLASS:

491+, appropriate subclasses for the use of an aqueous organic material as a contacting agent.

499+, for processes involving the use of water as a contacting agent.