The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 1980
Filed:
Feb. 26, 1979
Applicant:
Inventors:
Takezo Sano, Takatsuki, JP;
Ichiki Murase, Ibaraki, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08B / ;
U.S. Cl.
CPC ...
536 30 ; 8196 ; 536 32 ; 536 43 ;
Abstract
A cellulosic ion-exchange fiber having a functional group represented by the formula, ##STR1## wherein n is 1 or 2 and M is a hydrogen atom, alkali metal or ammonium residue, is produced by dipping a cellulosic fiber in an aqueous solution containing an intermediate of the formula, ##STR2## wherein n and M are as defined above; and X is halogen, in the presence of an alkali and applying heat treatment, thereby introducing the above-mentioned functional group.