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. 17, 1992
Filed:
Dec. 17, 1990
Applicant:
Inventors:
Josef Pitha, Baltimore, MD (US);
Bengt Lindberg, Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; C08B / ;
U.S. Cl.
CPC ...
514 58 ; 536103 ; 514936 ;
Abstract
A method for obtaining a desired pattern of substitution of hydroxyalkyl groups on cyclodextrins which comprises controlling the basicity of a reaction mixture comprising epoxide and cyclodextrins and a suitable solvent. Through the proper control of basicity with, e.g., sodium hydroxide, hydroxyalkyl substitution may be directed either toward the narrow or wide opening of the cavity of cyclodextrins.