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:
Mar. 05, 1996
Filed:
May. 17, 1994
Applicant:
Inventor:
Heike Kelkenberg, Gladbeck, DE;
Assignee:
Chemische Fabrik Stockhausen GmbH, Krefeld, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08B / ; C07C / ; C07H / ;
U.S. Cl.
CPC ...
536 20 ; 536124 ; 536127 ; 525 543 ; 604358 ; 604367 ; 604374 ; 604375 ; 604376 ;
Abstract
Chitosan absorbent is prepared by reacting pulverized chitosan suspended as a powder in an organic solvent with an acid and then isolating solid chitosan-acid reaction product.