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:
Jul. 30, 1991
Filed:
Sep. 14, 1990
Applicant:
Inventors:
Milos Sovak, Rancho Santa Fe, CA (US);
Ramachandran Ranganathan, San Diego, CA (US);
Assignee:
Cook Imaging Corporation, Bloomington, IN (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; A61K / ; A61K / ;
U.S. Cl.
CPC ...
424-5 ; 564153 ;
Abstract
Novel non-ionic contrast media are efficiently prepared from generally available ionic contrast media. Particularly, polyhydroxyhalohydrocarbons are employed with a triiodo-substituted acylamido benzoic acids in aqueous weakly basic media to selectively substitute the amido nitrogen, followed by activation of the carboxyl group for amide formation.