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:
May. 10, 1977
Filed:
Jul. 30, 1975
Applicant:
Inventors:
Karl Heinrich Lieser, Seeheim, DT;
Peter Burba, Darmstadt, DT;
Assignee:
Riedel-de Haen Aktiengesellschaft, Seelze-Hannover, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08B / ;
U.S. Cl.
CPC ...
536 43 ; 260 / ;
Abstract
Ion exchanges on cellulose basis containing groups of the formula ##STR1## in which R represents a functional group and n is zero or 1 are prepared, when n is zero, by reacting cellulose or a cellulose-like compound with a .beta.-hydroxyethylsulfonyl derivative and, when n is 1, by preparing a cellulose derivative from cellulose and an amino derivative of .beta.-hydroxyethylsulfone, diazotizing the cellulose derivative and introducing R-H functional groups by coupling of ligands capable of being coupled.