US PATENT SUBCLASS 526 / 131
.~.~.~.~ Material contains boron atom

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
72  DF  .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43}
89  DF  .~.~ Polymerizing in the presence of a specified material other than monomer {28}
90  DF  .~.~.~ Material contains transition metal or compound thereof {15}
131.~.~.~.~ Material contains boron atom {2}
132  DF  .~.~.~.~.~> Contains non-transition elemental metal, hydride thereof, or carbon to non transition metal atom bond {1}
134  DF  .~.~.~.~.~> Boron compound contains boron bonded to hydrogen or to carbon atom

DEFINITION

Classification: 526/131

(under subclass 90) Subject matter wherein the specified material contains a transition-metal compound which is in admixture with a boron-containing material, or wherein the transition-metal compound, additionally, contains at least one boron atom therein.