US PATENT SUBCLASS 521 / 147
.~.~.~.~ With oxygen or nitrogen containing reactant

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
50  DF  .~ CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. {27}
142  DF  .~.~ Cellular product derived from ethylenically unsaturated reactants only {5}
146  DF  .~.~.~ From aromatic reactant {2}
147.~.~.~.~ With oxygen or nitrogen containing reactant

DEFINITION

Classification: 521/147

With Oxygen or nitrogen containing reactant:

(under subclass 146) Subject matter wherein the ethylenically unsaturated aromatic reactant is reacted with at least an oxygen or nitrogen containing ethylenically unsaturated reactant.