US PATENT SUBCLASS 524 / 324
.~.~.~.~.~.~ Fused or bridged ring system

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}
323  DF  .~.~.~.~.~ Aryl-OH or salt or aryl-O-metal bond DNRM {12}
324.~.~.~.~.~.~ Fused or bridged ring system {1}
325  DF  .~.~.~.~.~.~.~> Fused or bridged ring system having at least three rings

DEFINITION

Classification: 524/324

Fused or bridged ring system:

(under subclass 323) Subject matter wherein the designated nonreactant material contains a fused- or bridged-ring system, e.g., butyl-4-methyl-6-indanyl phenol, etc.

(1) Note. A fused or bridged ring system for this subclass requires at least two fused or bridged carbocyclic rings. See the Class 520 Glossary.

(2) Note. In the absence of information to the contrary, the reaction product of a phenolic compound and a material containing a fused or bridged ring system is presumed to form a compound containing a fused- or bridged-ring system and is properly classifiable herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

327+, for a cyclic metal salt of a phenolic compound, e.g., antimonyl p-phenyl catecholate, etc.