US PATENT SUBCLASS 521 / 165
.~.~.~.~.~ Phosphorus 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}
155  DF  .~.~ Cellular product derived from a -N=C=X containing reactant wherein X is a chalcogen atom {10}
163  DF  .~.~.~ With nitrogen containing reactant {1}
164  DF  .~.~.~.~ Nitrogen reactant contains a C-XH group wherein X is a chalcogen atom and wherein the C atom is not double-bonded to a chalcogen atom {3}
165.~.~.~.~.~ Phosphorus containing reactant

DEFINITION

Classification: 521/165

Phosphorus containing reactant:

(under subclass 164) Subject matter wherein a phosphorus containing material is employed as a reactant.

(1) Note. The phosphorus containing material may be in the same compound as the nitrogen atom or may be in a separate reactant.