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:
Sep. 22, 1998
Filed:
Feb. 20, 1997
Applicant:
Inventors:
Assignee:
Dibra S.p.A., , IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; C07C / ;
U.S. Cl.
CPC ...
564153 ; 210635 ; 210639 ; 424-935 ; 424-937 ; 424-943 ; 424-9425 ; 424-9454 ; 424-95 ; 536 55 ;
Abstract
A process for the purification of opacifying contrastographic agents, comprising chromatographic and nanofiltration techniques combined together, the subsequent chromatographic separation of the crude product solution and a nanofiltration step, with a final deionization on ion exchange resins.