US PATENT SUBCLASS 162 / 60
.~ With washing


Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

1  DF  PROCESSES OF CHEMICAL LIBERATION, RECOVERY OR PURIFICATION OF NATURAL CELLULOSE OR FIBROUS MATERIAL {33}
60.~ With washing


DEFINITION

Classification: 162/60

(under subclass 1) Processes combined with a step of passing a nonreactive liquid through the fibrous material so as to remove undesired material therefrom.

(1) Note. Processes in which the washing is included only broadly, as by name only, are not included but are classified elsewhere on other bases.

SEE OR SEARCH CLASS

8, Bleaching and Dyeing: Fluid Treatment and Chemical Modification of Textiles and Fibers, particularly

156, for processes of washing of pulp or fibers.