US PATENT SUBCLASS 162 / 8
.~.~ With alkali metal, alkaline earth metal, or ammonium compound

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}
4  DF  .~ Waste paper or textile waste {4}
8.~.~ With alkali metal, alkaline earth metal, or ammonium compound

DEFINITION

Classification: 162/8

(under subclass 4) Processes in which an alkali metal, an alkaline earth metal or ammonium compound is employed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

90, for processes of digesting or treating nonwaste or unused cellulose in which an alkali metal, alkaline earth metal or ammonium hydroxide or carbonate is employed.