US PATENT SUBCLASS 523 / 442
.~.~.~.~ Heavy or transition metal or compound thereof

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
400  DF  .~.~ Process of forming a composition containing a nonreactive material (NRM) and a polymer containing more than one 1,2-epoxy group, or a preformed polymer derived from or admixed with a reactant containing more than one 1,2-epoxy group, or with a polymer derived from an epihalohydrin and a polyhydric phenol or polyol; or composition or product thereof {24}
440  DF  .~.~.~ Designated nonreactive material (DNRM) has numerically specified characteristics, e.g., particle size, density, etc., other than viscosity, m.p., b.p., molec. wt., chemical composition or percentage range {2}
442.~.~.~.~ Heavy or transition metal or compound thereof

DEFINITION

Classification: 523/442

Heavy or transition metal or compound thereof:

(under subclass 440) Subject matter wherein the DNRM having numerical limitations contains a heavy or transition metal or compound thereof, e.g., antimony oxide, copper, nickel, etc.

(1) Note. A heavy metal is limited to those elements having a specific gravity which is four or greater; and see the Class 520 Glossary for a definition of "transition metal".