US PATENT SUBCLASS 524 / 36
.~.~.~.~.~ Sulfur-containing ester, e.g., viscose, xanthate, 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}
27  DF  .~.~.~ Carbohydrate or derivative DNRM {9}
35  DF  .~.~.~.~ Cellulose {3}
36.~.~.~.~.~ Sulfur-containing ester, e.g., viscose, xanthate, etc.

DEFINITION

Classification: 524/36

Sulfur containing ester, e.g., viscose, xanthate, etc.:

(under subclass 35) Subject matter wherein the cellulose DNRM contains at least one sulfur atom.

(1) Note. Included herein is viscose as a DNRM and which is usually made by reacting carbon disulfide with the sodium salt of cellulose to yield a xanthate, which forms a viscous collodial solution in dilute aqueous alkali.

(2) Note. This subclass provides for the colloidal solution as well as the cellulose xanthate. [figure]