Process of treating wood pulp to remove pitch
United States Patent 2144756
Inventors:
Fritz, James H.
Publication Date:
01/24/1939
View Patent Images:
Export Citation:
Assignee:
NAT OIL PROD CO
Primary Class:
Other Classes:
162/75, 162/72, 162/DIG.004
International Classes:
D21C9/08; D21C9/00