US PATENT SUBCLASS 162 / 55
.~ With classifying, separating or screening of pulp (solids from solids)

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}
55.~ With classifying, separating or screening of pulp (solids from solids)

DEFINITION

Classification: 162/55

(under subclass 1) Processes combined with a step of separating solid components of the fibrous material undergoing chemical treatment, from one another, in grades or classes according to physical characteristics.

SEE OR SEARCH CLASS

209, Classifying, Separating, and Assorting Solids, appropriate subclasses, for processes for the separation of solids from solids in grades or classes according to physical characteristics.