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:
Nov. 28, 2006
Filed:
Oct. 23, 2002
Applicant:
Michio Ito, Nagano, JP;
Inventor:
Michio Ito, Nagano, JP;
Assignee:
Matsumoto Dental University, Nagano, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 31/722 (2006.01); A61K 2/28 (2006.01); A61K 5/09 (2006.01);
U.S. Cl.
CPC ...
Abstract
By irradiatingCo γ ray to chitin/chitosan, chitin/chitosan having high molecular weight is separated or decomposed into low molecular weight chitin/chitosan. A method of producing an osteoconduction substance comprises the steps of irradiatingCo γ ray to chitin/chitosan to produce low molecular weight chitin/chitosan; preparing chitosan sol by dissolving low molecular weight chitin/chitosan in an acidic aqueous solution to obtain a chitosan acidic aqueous solution and kneading the chitosan acidic aqueous solution and apatite powder; and neutralizing the chitosan sol by the use of a neutralizing agent.