US PATENT SUBCLASS 524 / 294
.~.~.~.~.~.~.~ Two or more carboxylic acids or ester groups each directly attached to a nuclear carbon of the same aryl group through the carbonyl of the carboxylic acid or ester group

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}
284  DF  .~.~.~.~.~ Carboxylic acid or derivative and wherein the derivative is other than a metal salt DNRM {3}
287  DF  .~.~.~.~.~.~ Aryl group {5}
294.~.~.~.~.~.~.~ Two or more carboxylic acids or ester groups each directly attached to a nuclear carbon of the same aryl group through the carbonyl of the carboxylic acid or ester group {1}
295  DF  .~.~.~.~.~.~.~>.~ A single aryl group {1}

DEFINITION

Classification: 524/294

Two or more carboxylic acids or esters groups each directly attached to a nuclear carbon of the same aryl group through the carbonyl of the carboxylic acid or ester group:

(under subclass 287) Subject matter wherein a carboxylic acid or ester derivative contains a single aryl group having two or more COOH or COOR groups each directly attached to the aryl ring through the carbonyl group of the COOH or COOR group.