US PATENT SUBCLASS 524 / 38
.~.~.~.~.~.~ Mixed carboxylate ester

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}
27  DF  .~.~.~ Carbohydrate or derivative DNRM {9}
35  DF  .~.~.~.~ Cellulose {3}
37  DF  .~.~.~.~.~ Carboxylic acid ester {2}
38.~.~.~.~.~.~ Mixed carboxylate ester {1}
39  DF  .~.~.~.~.~.~.~> Acetate {1}

DEFINITION

Classification: 524/38

Mixed carboxylate ester:

(under subclass 37) Subject matter wherein the cellulose contains at least two diverse carboxylic acid ester groups.

(1) Note. Included herein are, e.g., cellulose acetate butyrate, cellulose butyrate benzoate, etc.