US PATENT SUBCLASS 524 / 102
.~.~.~.~.~.~.~ Two or more nitrogen rings


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}
86  DF  .~.~.~.~.~ Nitrogen atom as part of a hetero ring DNRM {5}
99  DF  .~.~.~.~.~.~ Six-membered nitrogen ring, e.g., pyridine, etc. {2}
102.~.~.~.~.~.~.~ Two or more nitrogen rings {1}
103  DF  .~.~.~.~.~.~.~>.~ Nonhetero nitrogen


DEFINITION

Classification: 524/102

Two or more nitrogen rings:

(under subclass 99) Subject matter wherein the heterocyclic compound contains at least one hetero nitrogen containing

ring in addition to the six-membered hetero ring.