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:
Dec. 04, 1990
Filed:
May. 19, 1989
Applicant:
Inventors:
Chuichi Hirayama, Kumamoto-Shi, Kumamoto, JP;
Hirotaka Ihara, Kumamoto-Shi, Kumamoto, JP;
Junichi Ida, Tokyo, JP;
Assignees:
Kurita Water Industries Ltd., Tokyo, JP;
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B / ; A61K / ;
U.S. Cl.
CPC ...
536 20 ; 536 553 ;
Abstract
A method for preparing granular porous chitosan which comprises dispersing an acidic aqueous solution of chitosan in a hydrophobic dispersing medium; and, evaporating water off while stirring the resulting dispersion.