Patents by Inventor Karri Papa Rao

Karri Papa Rao 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 preparing bicalutamide
    Patent number: 8895772
    Abstract: The present invention provide processes for the preparation of N-[4-Cyano-3-(trifluoro methyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide (I). The present application also provides a method of purification of N-[4-Cyano-3-(trifluoro methyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide (I) using ethyl acetate solvent resulting in the product, substantially free from process related impurities A, B, C and D. The crystalline product of the process according to the present invention having an XRDP pattern as per FIG. 1, is useful as an active pharmaceutical and has anti-androgenic activity.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: November 25, 2014
    Assignee: Shilpa Medicare Limited
    Inventors: Vimal Kumar Shrawat, Karri Papa Rao, Rafiuddin, Prashant Purohit
  • PROCESS FOR PREPARING BICALUTAMIDE
    Publication number: 20130274501
    Abstract: The present invention provide processes for the preparation of N-[4-Cyano-3-(trifluoro methyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide (I). The present application also provides a method of purification of N-[4-Cyano-3-(trifluoro methyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide (I) using ethyl acetate solvent resulting in the product, substantially free from process related impurities A, B, C and D. The crystalline product of the process according to the present invention having an XRDP pattern as per FIG. 1, is useful as an active pharmaceutical and has anti-androgenic activity.
    Type: Application
    Filed: August 29, 2011
    Publication date: October 17, 2013
    Inventors: Vimal Kumar Shrawat, Karri Papa Rao, N/A Rafiuddin, Prashant Purohit