US PATENT SUBCLASS 524 / 211
.~.~.~.~.~.~.~ N-(C=X)N, e.g., urea, 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}
210  DF  .~.~.~.~.~.~ N-C=X group wherein X is a chalcogen {10}
211.~.~.~.~.~.~.~ N-(C=X)N, e.g., urea, etc. {5}
212  DF  .~.~.~.~.~.~.~>.~ Two or more -N-(C=X)N groups
213  DF  .~.~.~.~.~.~.~>.~ Atom other than C, N, H, or chalcogen; or contains nitrogen or chalcogen atom other than as part of a N(C=X)
214  DF  .~.~.~.~.~.~.~>.~ Carbocyclic group
215  DF  .~.~.~.~.~.~.~>.~ With water NRM
216  DF  .~.~.~.~.~.~.~>.~ At least one solid polymer derived from ethylenic reactants only


DEFINITION

Classification: 524/211

N-(C=X)N, e.g., Urea, etc.:

(under subclass 210) Subject matter wherein the nitrogen compound contains at least one N--N group.

(1) Note. The N--N group may be in X addition to a -N- group or the -N--N group may be part of the N- group.