US PATENT SUBCLASS 162 / 39
.~.~.~.~ In digester

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}
37  DF  .~.~ Digestion fluid reused on different fibrous materials {2}
38  DF  .~.~.~ With addition of chemicals prior to reuse {1}
39.~.~.~.~ In digester

DEFINITION

Classification: 162/39

(under subclass 38) Processes in which the chemicals are added to the used digestion fluid in the digester in which the regenerated fluid is employed for digesting or treating the second batch of fibrous material.