US PATENT SUBCLASS 524 / 111
.~.~.~.~.~.~ Five-membered chalcogen ring


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}
107  DF  .~.~.~.~.~ At least one chalcogen atom as part of a hetero ring (chalcogen=O, Se, Te) DNRM {5}
111.~.~.~.~.~.~ Five-membered chalcogen ring {2}
112  DF  .~.~.~.~.~.~.~> Cyclic polycarboxylic acid anhydride
113  DF  .~.~.~.~.~.~.~> Tetrahydrofuran per se


DEFINITION

Classification: 524/111

Five-membered chalcogen ring:

(under subclass 107) Subject matter wherein the hetero ring is a five-membered ring.