US PATENT SUBCLASS 162 / 66
.~.~ Chlorine containing material

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}
63  DF  .~ Gas, vapor or mist contact {4}
66.~.~ Chlorine containing material {1}
67  DF  .~.~.~> Chlorine dioxide

DEFINITION

Classification: 162/66

(under subclass 63) Processes in which the gas, vapor or mist contains chlorine, free or combined.

SEE OR SEARCH THIS CLASS, SUBCLASS:

87+, for processes of digestion or treating fibrous material with a chlorine containing agent (not involving gas-fiber contact).