US PATENT SUBCLASS 524 / 196
.~.~.~.~.~.~ N=C=X group wherein X is a chalcogen, e.g., isocyanate, etc.

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}
1  DF  .~.~ Adding a NRM to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof {31}
80  DF  .~.~.~ DNRM which is other than silicon dioxide, glass, titanium dioxide, water, halohydrocarbon, hydrocarbon, or elemental carbon {4}
81  DF  .~.~.~.~ Organic DNRM {21}
186  DF  .~.~.~.~.~ Organo nitrogen compound other than unsubstituted ammonium salt as sole nitrogen atom DNRM {12}
196.~.~.~.~.~.~ N=C=X group wherein X is a chalcogen, e.g., isocyanate, etc. {1}
197  DF  .~.~.~.~.~.~.~> At least one solid polymer derived from ethylenic reactants only

DEFINITION

Classification: 524/196

N=C=X group wherein X is a chalcogen, e.g., isocyanate, etc.:

(under subclass 186) Subject matter wherein the nitrogen compound contains at least one N=C=X group wherein X is a chalcogen atom, e.g., isocyanate, etc.

(1) Note. Chalcogen is limited to oxygen, sulphur, selenium, and tellurium.