US PATENT SUBCLASS 521 / 170
.~.~.~ With -XH reactant wherein X is a chalcogen atom


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.~.~.~ With -XH reactant wherein X is a chalcogen atom {3}
171  DF  .~.~.~.~> -XH reactant contains a halogen atom
172  DF  .~.~.~.~> -XH reactant contains a C=X group, e.g., carboxylic acid ester, etc. {1}
174  DF  .~.~.~.~> -XH reactant contains a C-X-C group {3}


DEFINITION

Classification: 521/170

With -XH reactant wherein X is a chalcogen atom:

(under subclass 155) Subject matter wherein a -XH (X is a chalcogen containing material) is reacted with a -N=C=X containing material.

(1) Note. For purposes of this subclass the -XH material need not be bonded to a carbon atom.

(2) Note. This subclass includes but is not limited to mercaptans, glycols, and carbonic acid as reactants.