US PATENT SUBCLASS 524 / 872
.~.~.~ Two or more N=C=X containing reactants (other than conventional isomer mixtures)

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF (Class 523, subclass 1) {17}
871  DF  .~.~ N=C=X containing reactant forming a solid polymer or SICP in the presence of a nonreactant material (X is chalcogen) {4}
872.~.~.~ Two or more N=C=X containing reactants (other than conventional isomer mixtures)

DEFINITION

Classification: 524/872

Two or more N=C=X containing reactants (other than conventional isomer mixtures):

(under subclass 871) Subject matter wherein there are at least two N=C=X containing reactants.

(1) Note. Commercially conventional isomer ratios such as 80:20 2,4-; 2,6- toluene diisocyanate are excluded herefrom since these isomer mixtures are inherent in the method of isocyanate preparation.