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:
Oct. 05, 2010
Filed:
Apr. 03, 2009
Christopher N. Jobdevairakkam, Plainsboro, NJ (US);
Jayaraman Kannappan, Gujrat, IN;
Jagadeesh B. Rangisetty, Hyderabad, IN;
Christopher N. Jobdevairakkam, Plainsboro, NJ (US);
Jayaraman Kannappan, Gujrat, IN;
Jagadeesh B. Rangisetty, Hyderabad, IN;
Navinta LLC, Ewing, NJ (US);
Abstract
The present invention provides an improved process of preparing hydralazine hydrochloride, which involves the preparation of 1-chlorophthalazine salt and further reacting with hydrazine followed by purification of hydralazine hydrochloride, which is free of phosphate, does not contain any individual impurities more than 0.05%, total impurities less than 0.5%, and a hydrazine content of not more than 0.001%, and preferably less than 0.0003%. One benefit of improved purity is enhanced storage stability.