US PATENT SUBCLASS 521 / 183
.~.~.~ 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}
182  DF  .~.~ Cellular product derived from a -C-C(=X)-X containing reactant wherein X is a chalcogen atom, e.g., phthalic acid, etc. {1}
183.~.~.~ Nitrogen containing reactant {1}
184  DF  .~.~.~.~> Nitrogen reactant contains at least two amino nitrogen atoms {1}

DEFINITION

Classification: 521/183

Nitrogen containing reactant:

(under subclass 182) Subject matter wherein at least one reactant contains a nitrogen atom.

(1) Note. The nitrogen atom may be part of the C X reactant or may be part of an additional co-reactant.