US PATENT SUBCLASS 525 / 494
.~.~.~.~.~ Contains nitrogen-containing reactant or polymer therefrom

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}
480  DF  .~.~ Solid polymer or specified intermediate condensation product derived from at least one phenolic reactant and at least one aldehyde or aldehyde-type reactant or polymer therefrom {10}
491  DF  .~.~.~ Mixed with additional aldehyde or aldehyde-type reactants which are part of a SPFI system or polymer thereof {5}
493  DF  .~.~.~.~ Additional material is ketone-aldehyde- or ketone-aldehyde-type polymer, condensate, or reactants thereof {1}
494.~.~.~.~.~ Contains nitrogen-containing reactant or polymer therefrom

DEFINITION

Classification: 525/494

Contains nitrogen-containing reactants or polymer therefrom:

(under subclass 493) Subject matter which contains a nitrogen-containing reactant or polymer.

(1) Note. In this subclass, the nature of the nitrogen is insignificant in that it may be either a part of the polymer, specified polymer-forming reactant system, or an independent material.