Patents by Inventor Pranab Chatterjee

Pranab Chatterjee 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).

  • Process for the preparation of febuxostat
    Patent number: 8916713
    Abstract: An improved and efficient process for the preparation of 2-[3-cyano-4-(2-methylpropoxy)phenyl]-4-methylthiazole-5-carboxylic acid (febuxostat) that is substantially free from amide by-product is provided.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: December 23, 2014
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Pranab Chatterjee, Asok Nath, Sarbjot Singh Sokhi, Mohan Prasad
  • PROCESS FOR THE PREPARATION OF FEBUXOSTAT
    Publication number: 20130245278
    Abstract: An improved and efficient process for the preparation of 2-[3-cyano-4-(2-methylpropoxy)phenyl]-4-methylthiazole-5-carboxylic acid (febuxostat) that is substantially free from amide by-product is provided.
    Type: Application
    Filed: July 15, 2011
    Publication date: September 19, 2013
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Pranab Chatterjee, Asok Nath, Sarbjot Singh Sokhi, Mohan Prasad
  • POLYMORPHIC FORM OF TOREMIFENE CITRATE AND PROCESS FOR ITS PREPARATION
    Publication number: 20120178821
    Abstract: The present invention provides a polymorphic form of toremifene citrate and processes for its preparation. It also relates to an improved process for the preparation of the Z isomer of the toremifene base, free of E isomer, and its pharmaceutically acceptable salts.
    Type: Application
    Filed: July 30, 2010
    Publication date: July 12, 2012
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Pranab Chatterjee, Asok Nath, Mohan Prasad