Patents by Inventor Jagadeesh B. Rangisetty

Jagadeesh B. Rangisetty has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Manufacture of pure hydralazine salts
    Patent number: 7807830
    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.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: October 5, 2010
    Assignee: Navinta LLC
    Inventors: Christopher N. Jobdevairakkam, Jayaraman Kannappan, Jagadeesh B. Rangisetty
  • Process of making optically pure L-pipecolic acid and process of making anesthetics and intermediates therefrom
    Patent number: 7683175
    Abstract: The present invention describes a novel process of preparation of optically pure L-Pipecolic acid and an improved process for the conversion of L-pipecolic acid to L-N-(2,6-dimethylphenyl)-1-propyl-2-piperidinocarboxamide, its hydrochloride salt and hydrochloride monohydrate.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: March 23, 2010
    Assignee: Navinta, LLC
    Inventors: Jagadeesh B. Rangisetty, Manik R. Pullagurla, Raja J. J. Muthiah, Christopher N. Jobdevairakkam
  • Manufacture of Pure Hydralazine Salts
    Publication number: 20090187018
    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.
    Type: Application
    Filed: April 3, 2009
    Publication date: July 23, 2009
    Applicant: Navinta LLC
    Inventors: Christopher N. Jobdevairakkam, Jayaraman Kannappan, Jagadeesh B. Rangisetty
  • Manufacture of pure hydralazine salts
    Patent number: 7531653
    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.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: May 12, 2009
    Assignee: Navinta LLC
    Inventors: Jagadeesh B. Rangisetty, Christopher N. Jobdevairakkam, Jayaraman Kannappan