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:
Apr. 15, 2008
Filed:
Jan. 16, 2004
Revital Lifshitz-liron, Herzlia, IL;
Ramiy Lidor-hadas, Kfar Saba, IL;
Nissm Sasson, Or Akiva, IL;
Igor Lifshitz, Petach-Tiqva, IL;
Revital Lifshitz-Liron, Herzlia, IL;
Ramiy Lidor-Hadas, Kfar Saba, IL;
Nissm Sasson, Or Akiva, IL;
Igor Lifshitz, Petach-Tiqva, IL;
Teva Pharmaceutical Industries Ltd., Petah Tiqva, IL;
Abstract
The present invention relates to a method of making risedronate sodium substantially free of iron including the steps of refluxing, especially with mechanical agitation, a combination of risedronic acid, a sodium base, especially sodium hydroxide, and an iron-reducing amount of EDTA in a liquid that is water, a lower alkanol, or, especially, a mixture of a lower alkanol and water; and isolating risedronate sodium substantially free of iron from the combination.