US PATENT SUBCLASS 525 / 279
.~.~.~.~ Ethylenic reactant contains nitrogen heterocycle, e.g., pyridine, diazines, etc.

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}
242  DF  .~.~.~ Polymer derived from ethylenic reactants only mixed with ethylenic reactant {21}
279.~.~.~.~ Ethylenic reactant contains nitrogen heterocycle, e.g., pyridine, diazines, etc. {4}
280  DF  .~.~.~.~.~> Block copolymer
281  DF  .~.~.~.~.~> Nitrogen heterocycle contains at least two nitrogen atoms in the same ring
282  DF  .~.~.~.~.~> Imide
283  DF  .~.~.~.~.~> Lactam

DEFINITION

Classification: 525/279

Ethylenic reactant contains nitrogen heterocycle:

(under subclass 242) Subject matter wherein the ethylenic reactant contains a nitrogen heterocycle (e.g., 4-vinyl pyridine, etc.).

(1) Note. An ethylenically unsaturated nitrogen heterocyclic compound may contain a carbon-to-carbon double bond outside (exo) or inside (endo) the ring containing the nitrogen atom (s), e.g., N-vinylpyrrolidone, 1, 2-, 1, 3- and 1, 4-, diazine, pyridine, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

242, for definitions of the terms "ethylenic reactant" and "aromatic".