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. 23, 2010
Filed:
Dec. 24, 2003
William M. Hung, Alpharetta, GA (US);
Katrina L. Bergbauer, Decatur, GA (US);
Kai C. Su, Alpharetta, GA (US);
Guigui Wang, Cumming, GA (US);
William M. Hung, Alpharetta, GA (US);
Katrina L. Bergbauer, Decatur, GA (US);
Kai C. Su, Alpharetta, GA (US);
Guigui Wang, Cumming, GA (US);
Adjuvant Pharmaceuticals, LLC, Alpharetta, GA (US);
Abstract
The present invention is directed to a water soluble, randomly substituted partial N-, partial O-acetylated chitosans or chitosan derivatives and methods of preparing water soluble, randomly substituted partial N-, partial O-acetylated chitosans or chitosan derivatives comprising the steps of dissolving the chitosan or chitosan derivative into an aqueous acidic solution and reacting the chitosan or chitosan derivative with an acetylating agent in the presence of a phase transfer reagent. The present invention is further directed to a pharmaceutical preserving composition comprising: (a) at least one chitosan or chitosan derivative and (b) at least one buffer solution, as well as methods of preserving contact lens solutions and disinfecting contact lens using such composition.