US PATENT SUBCLASS 521 / 160
.~.~.~ Two or more N=C=X reactants

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
50  DF  .~ CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. {27}
155  DF  .~.~ Cellular product derived from a -N=C=X containing reactant wherein X is a chalcogen atom {10}
160.~.~.~ Two or more N=C=X reactants

DEFINITION

Classification: 521/160

Two or more N=C=X reactants:

(under subclass 155) Subject matter wherein two or more -N=C=X (X is a chalcogen)containing materials are employed.

(1) Note. Excluded from this subclass are those conventional commercial compositions which are mixtures of toluene disocyanate (e.g., 2, 4 and 2, 6 TDi, 20/80 percent and 35/65 percent, etc.). However, mixtures of stereo and position isomers are included herein if proportions are recited.