US PATENT SUBCLASS 524 / 109-- .~.~.~.~.~.~ Two or more chalcogen rings

US PATENT SUBCLASS 524 / 109
.~.~.~.~.~.~ Two or more chalcogen 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}
107	DF	.~.~.~.~.~ At least one chalcogen atom as part of a hetero ring (chalcogen=O, Se, Te) DNRM {5}
109		.~.~.~.~.~.~ Two or more chalcogen rings

DEFINITION

Classification: 524/109

Two or more chalcogen rings:

(under subclass 107) Subject matter wherein the heterocyclic compound contains two or more hetero rings.

(1) Note. Fused or bridged rings sharing one or more hetero chalcogen atoms are viewed as containing two heterocyclic rings.

(2) Note. Epoxidized plural unsaturated fatty acids or esters, in the absence of information to the contrary, are viewed as containing at least two epoxy rings, e.g., epoxidized soybean oil, and are therefore proper for this subclass.