US PATENT SUBCLASS 524 / 296
.~.~.~.~.~.~.~.~.~ Only two carboxylic acid or ester groups directly attached to an aryl group, e.g., phthalic acid, etc.

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  DF  .~.~.~.~.~.~.~ 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}
296.~.~.~.~.~.~.~.~.~ Only two carboxylic acid or ester groups directly attached to an aryl group, e.g., phthalic acid, etc. {2}
297  DF  .~.~.~.~.~.~.~>.~.~.~ Dioctyl or dibutyl ester, e.g., di-(2-ethylhexyl) phthalate, etc.
298  DF  .~.~.~.~.~.~.~>.~.~.~ Three or more carboxylic acid or ester groups

DEFINITION

Classification: 524/296

Only two carboxylic acid or ester groups directly attached to an aryl group, e.g., phthalic acid, etc.:

(under subclass 295) Subject matter wherein the single aryl group contains only two COOH or COOR groups each of which are directly attached through the carbon atom of the COOH or COOR group to the aryl ring, e.g., di(2-ethyl hexyl phthalate, etc.).