US PATENT SUBCLASS 528 / 236
.~.~.~.~ Material contains a heavy metal atom

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}
230  DF  .~ FROM ALDEHYDE OR DERIVATIVE THEREOF AS REACTANT {12}
232  DF  .~.~ Polymerizing in the presence of a specified material other than a reactant {4}
233  DF  .~.~.~ Material contains a metal atom {4}
236.~.~.~.~ Material contains a heavy metal atom {1}
237  DF  .~.~.~.~.~> Heavy metal is a Group IVA metal atom (Ge, Sn, Pb)

DEFINITION

Classification: 528/236

(under subclass 233) Subject matter wherein the specified material contains at least one heavy metal atom.

(1) Note. Since transition metals are not classified herein subclasses 234+ above, the term "heavy metal" herein is limited to elements of atomic numbers 30-33, 48-51, 80-84, and 88.

SEE OR SEARCH THIS CLASS, SUBCLASS:

234+, for transition metal containing specified materials.