US PATENT SUBCLASS 525 / 327.7
.~.~.~.~.~ 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}
327.4  DF  .~.~.~.~ Polymer derived from carboxylic acid anhydride monomer {4}
327.7.~.~.~.~.~ Esterified, i.e., preparation of COOR linkage

DEFINITION

Classification: 525/327.7

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

(under subclass 327.4) 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, e.g., lactone structure, etc.

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