US PATENT SUBCLASS 521 / 184
.~.~.~.~ Nitrogen reactant contains at least two amino nitrogen atoms

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  DF  .~.~.~ Nitrogen containing reactant {1}
184.~.~.~.~ Nitrogen reactant contains at least two amino nitrogen atoms {1}
185  DF  .~.~.~.~.~> Carbocyclic reactant containing -C-C(=X)-X, e.g., containing carboxyl, etc.

DEFINITION

Classification: 521/184

Nitrogen reactant contains at least two amino nitrogen atoms:

(under subclass 183) Subject matter wherein at least one reactant contains two or more amine groups.

(1) Note. An amine proper for this subclass requires (a) at least two distinct nitrogen atoms bonded to at least two distinct carbon atoms, or (b) the presence of at least two nitrogen atoms bonded to the same carbon atom. Each nitrogen atom single or double-bonded in the manner set forth above and consistent with the (1) Note above is an amine.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, the Glossary, for a definition of the term "amine".