Title:
EXTRACTION OF FIBROUS CELLULOSIC MATERIAL WITH AMMONIA FOLLOWING TREATMENT WITH CHLORINE,CHLORINE DIOXIDE OR OTHER REAGENTS
United States Patent 3472731
Inventors:
Liebergott, Norman
Yorston, Frederic H.
Application Number:
US3472731DA
Publication Date:
10/14/1969
Filing Date:
09/08/1966
Assignee:
Pulp, Paper Res Inst
Primary Class:
Other Classes:
8/107, 162/70, 162/89, 162/90
International Classes:
D21C9/10; (IPC1-7): D21C3/02; D21C1/08
View Patent Images:
US Patent References:
Foreign References:
GB175330A1922-02-01
GB321282A1929-11-07
GB601643A1948-05-10