US PATENT SUBCLASS 162 / 37
.~.~ Digestion fluid reused on different fibrous materials

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~ Digestion fluid reused on different fibrous materials {2}
38  DF  .~.~.~> With addition of chemicals prior to reuse {1}
40  DF  .~.~.~> Without treatment or modification

DEFINITION

Classification: 162/37

(under subclass 29) Processes in which liquor resulting from a chemical treatment of one batch of fibrous material is subsequently used for the chemical treatment of a different batch of fibrous material.

(1) Note. In this and indented subclasses are placed all processes in which liquor or chemicals from a digestion or fiber treating operation is subjected to treatment which under the disclosure conditions it for reuse for fiber digestion or treatment, regardless of whether the reuse is claimed unless it is positively disclosed that it is reused on the same fibrous material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41+, for processes in which used treating liquor or agent is reused on the same fibrous material.