US PATENT SUBCLASS 525 / 330.1
.~.~.~.~.~ Esterified, i.e., preparation of COOR linkage

Current as of: June, 1999
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525 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
55  DF  .~.~ At least one solid polymer derived from ethylenic reactants only {25}
326.1  DF  .~.~.~ Chemically after treated solid polymers derived from ethylenically unsaturated monomers only {24}
329.7  DF  .~.~.~.~ Polymer derived from acrylic or methacrylic acids, acid halides or salt monomers {4}
330.1.~.~.~.~.~ Esterified, i.e., preparation of COOR linkage

DEFINITION

Classification: 525/330.1

Esterified, i.e., preparation of COOR linkage:

(under subclass 329.7) Product wherein a chemical modification of the solid polymer is described as esterification.

(1) Note. For purposes of this subclass, esterification denotes formation of a carboxylic acid ester groupOR.

(2) Note. Reaction of carboxylic acid group with an alkylene oxide group is presumed to be esterification.

(3) Note. Included herein is formation of e.g., lactone structures, etc.