US PATENT SUBCLASS 162 / 45
.~.~.~.~ With addition of chemicals to recirculating fluid

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}
29  DF  .~ With regeneration, reclamation, reuse, recycling or destruction of digestion fluid {3}
41  DF  .~.~ Recirculation (includes separation from fibers) {2}
42  DF  .~.~.~ With treatment of fluids during recirculation {2}
45.~.~.~.~ With addition of chemicals to recirculating fluid

DEFINITION

Classification: 162/45

(under subclass 42) Processes in which chemicals, other than water or steam, are added to the fiber treating fluid being recirculated.

(1) Note. The "added chemicals" of the above definition have the significance indicated in (2) Note under the definition of subclass 38.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38+, for the addition of chemicals to fluid which has been used in treating one batch of fibers, to fortify it for use on another batch of fibers.