US PATENT SUBCLASS 528 / 234
.~.~.~.~ Material contains a transition metal atom


Current as of: June, 1999
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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}
234.~.~.~.~ Material contains a transition metal atom {1}
235  DF  .~.~.~.~.~> Transition metal atom is a Group VIII metal atom


DEFINITION

Classification: 528/234

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

(1) Note. Transition metal is limited to elements of atomic numbers 21-29, 39-47, 57-79, 89, and higher.