US PATENT SUBCLASS 528 / 222
.~.~ Polymerizing in the presence of a specified material other than a reactant

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}
220  DF  .~ FROM KETONE OR KETENE REACTANT {4}
222.~.~ Polymerizing in the presence of a specified material other than a reactant {3}
223  DF  .~.~.~> Material contains a phosphorus or sulfur atom
224  DF  .~.~.~> Material contains a nitrogen-containing compound
225  DF  .~.~.~> Material contains a boron or polyvalent metal atom

DEFINITION

Classification: 528/222

(under subclass 220) Subject matter wherein a ketone reactant is polymerized in the presence of a specified material.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for an explanation of the term "specified material".