US PATENT SUBCLASS 525 / 381
.~.~.~.~.~ Three or more amine groups

Current as of: June, 1999
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525 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
55  DF  .~.~ At least one solid polymer derived from ethylenic reactants only {25}
374  DF  .~.~.~ Chemical treating agent is a nitrogen-containing compound {5}
379  DF  .~.~.~.~ Organic amine {3}
381.~.~.~.~.~ Three or more amine groups

DEFINITION

Classification: 525/381

Three or more amine groups:

(under subclass 379) Treatment wherein the amine compound contains three or more amine groups.

(1) Note. An amine proper for this subclass requires (a) at least three distinct nitrogen atoms bonded to at least two distinct carbon atoms, or (b) the presence of at least three nitrogen atoms bonded to the same carbon atom.

SEE OR SEARCH THIS CLASS, SUBCLASS:

379, (1) Note, for a discussion of what constitutes an "amine" in this area.