US PATENT SUBCLASS 525 / 294
.~.~.~.~.~ Block copolymer derived from nitrogen-containing reactant

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}
293  DF  .~.~.~.~ Ethylenic material contains a nitrogen atom and is other than (meth)acrylonitrile {3}
294.~.~.~.~.~ Block copolymer derived from nitrogen-containing reactant

DEFINITION

Classification: 525/294

Block copolymer derived from nitrogen-containing reactant:

(under subclass 293) Subject matter wherein the polymer is a block copolymer derived from a nitrogen-containing reactant.

(1) Note. This subclass does not provide for the grafting of a nitrogen-containing reactant onto a nonnitrogen containing block copolymer.