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:
Sep. 25, 1990
Filed:
Nov. 14, 1989
Applicant:
Inventors:
Manssur Yalpani, Kirkland, CA;
Magdy M Abdel-Malik, Kirkland, CA;
Assignee:
Domtar Inc., De Maisonneuve, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07K / ; C12N / ; C12N / ; C07H / ;
U.S. Cl.
CPC ...
536 187 ; 536 30 ; 536 553 ; 536124 ; 536121 ; 530350 ; 530810 ; 530813 ; 435178 ; 435179 ; 435183 ;
Abstract
New Amines and amides of carboxylated polysaccharides having the nitrogen of the amido and amino groups directly attached to the polysaccharides and method of making same, based on reacting in solution a material having carboxyl-containing polysaccharides, such as carboxymethyl cellulose, with ammonium donors having the general formula >NH such as primary and secondary amine reagents and with or without a reducing agent to obtain amides or amines. These products may be used for instance in biological separations, for the immobilization of proteins, for the removal of metal ions, a thickeners, and as suspension agents.