US PATENT SUBCLASS 521 / 177
.~.~.~.~.~ C-X-C reactant contains a carbocyclic ring, e.g., aromatic, etc.

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}
155  DF  .~.~ Cellular product derived from a -N=C=X containing reactant wherein X is a chalcogen atom {10}
170  DF  .~.~.~ With -XH reactant wherein X is a chalcogen atom {3}
174  DF  .~.~.~.~ -XH reactant contains a C-X-C group {3}
177.~.~.~.~.~ C-X-C reactant contains a carbocyclic ring, e.g., aromatic, etc.

DEFINITION

Classification: 521/177

C-X-C reactant contains a carbocyclic ring, e.g., aromatic, etc.:

(under subclass 174) Subject matter wherein the -XH containing -C-X-C- reactant contains a carbocyclic ring.