US PATENT SUBCLASS 106 / 138.1
.~.~.~.~ Cellulose xanthate or viscose or cuprammonium cellulose

Current as of: June, 1999
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106 /   HD   COMPOSITIONS: COATING OR PLASTIC

*  DD  COATING OR PLASTIC COMPOSITIONS {40}
124.1  DF  .~ Proteinaceous material containing {21}
135.1  DF  .~.~ With carbohydrate or derivative {4}
136.1  DF  .~.~.~ Cellulosic material {7}
138.1.~.~.~.~ Cellulose xanthate or viscose or cuprammonium cellulose

DEFINITION

Classification: 106/138.1

Cellulose xanthate or viscose or cuprammonium cellulose:

(under subclass 136.1) Compositions wherein the cellulosic material is cellulose xanthate or viscose or cellulose in cupra-ammonium solution.

(1) Note. Cellulose xanthate or viscose is a cellulose derivative with the group: [figure]

(2) Note. The viscose process is based on the reaction of carbon disulfide with the sodium salt of cellulose to yield a xanthate, which forms a viscous colloidal solution in dilute aqueous alkali. [figure]