Patents by Inventor Hussain Haider

Hussain Haider 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 producing biphosphonic acids and forms thereof
    Patent number: 7872144
    Abstract: Disclosed herein is a process for producing bisphosphonic acids and salts thereof. The process comprising reacting a carboxylic acid of Formula [I] with phosphorous acid and halophosphorus compound in the presence of a solvent selected from aliphatic hydrocarbon or water miscible cyclic ether. Further, the present invention also provides novel forms of bisphosphonic acids and process for preparation thereof.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: January 18, 2011
    Assignee: Jubilant Organosys Limited
    Inventors: Satish Chandra Pandey, Hussain Haider, Sudhanshu Saxena, Manoj Kumar Singh, Rajesh Kumar Thaper, Sushil Kumar Dubey
  • Process for the Preparation of Letrozole
    Publication number: 20100190997
    Abstract: The present invention relates to the process for the preparation of Letrozole free from its regioisomer (7) and other impurities by selective extraction of desired intermediate (3) using suitable solvent and mixture of solvents.
    Type: Application
    Filed: September 4, 2006
    Publication date: July 29, 2010
    Inventors: Hussain Haider, Kirtipalsinh Saijansinh Solanki, Gautam Pal, Manoj Kumar Singh, Jay Shantilal Kothari, Virendra Kumar Agarwal
  • Process for producing biphosphonic acids and forms thereof
    Publication number: 20090312551
    Abstract: Disclosed herein is a process for producing bisphosphonic acids and salts thereof. The process comprising reacting a carboxylic acid of Formula [I] with phosphorous acid and halophosphorus compound in the presence of a solvent selected from aliphatic hydrocarbon or water miscible cyclic ether. Further, the present invention also provides novel forms of bisphosphonic acids and process for preparation thereof.
    Type: Application
    Filed: June 13, 2005
    Publication date: December 17, 2009
    Inventors: Satish Chandra Pandey, Hussain Haider, Sudhanshu Saxena, Manoj Kumar Singh, Rajesh Kumar Thaper, Sushil Kumar Dubey
  • Process for the Preparation of Pure Anastrozole
    Publication number: 20090221837
    Abstract: The present invention relates to the improved process for the preparation of Anastrozole free from the impurities arising due to impure 3,5-bis-(1-cyano-1-methylethyl)benzylbromide (2) and other related impurities resulting from incomplete/over-reaction of 2,2-(5-methyl-1,3-phenylene)-bis(2-methylpropionitrile (I).
    Type: Application
    Filed: September 4, 2006
    Publication date: September 3, 2009
    Inventors: Kirtipalsinh Saijansinh Solanki, Gautam Pal, Hussain Haider, Manoj Kumar Singh, Jay Shantilal Kothari, Virendra Kumar Agarwal