US PATENT SUBCLASS 524 / 306
.~.~.~.~.~.~.~ Ester having at least two carboxylic acid ester groups


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}
300  DF  .~.~.~.~.~.~ Two or more carbon atoms {8}
306.~.~.~.~.~.~.~ Ester having at least two carboxylic acid ester groups {4}
307  DF  .~.~.~.~.~.~.~>.~ Atom other than C, H, or O
308  DF  .~.~.~.~.~.~.~>.~ Oxygen atom other than as part of a carboxylic acid ester group {2}
311  DF  .~.~.~.~.~.~.~>.~ Three or more carboxylic acid ester groups {1}
314  DF  .~.~.~.~.~.~.~>.~ Ester derived from dicarboxylic acid


DEFINITION

Classification: 524/306

Ester having at least two carboxylic acid ester groups:

(under subclass 300) Subject matter wherein the carboxylic acid derivative is a carboxylic acid ester having at least two COOR groups.

(1) Note. See the Class 520 Glossary for the definition of a "carboxylic acid ester".