US PATENT SUBCLASS 162 / 22
.~.~ With chemical other than water or steam

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}
21  DF  .~ Defibration by projection or explosion {1}
22.~.~ With chemical other than water or steam

DEFINITION

Classification: 162/22

(under subclass 21) Processes in which the fibrous material is treated with a chemical agent other than water or steam usually to facilitate the liberation or purification of the fibrous material.