Patents by Inventor Koilkonda Purandhar

Koilkonda Purandhar 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).

  • Preparation of amorphous hydrous esomeprazole magnesium
    Patent number: 8134008
    Abstract: A hydrate of esomeprazole magnesium in the form of an amorphous solid is provided. Methods of preparation and use of, as well as formulation containing the hydrate of esomeprazole magnesium in the form of an amorphous solid are also provided.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: March 13, 2012
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Manne Satyanarayana Reddy, Muppa Kishore Kumar, Koilkonda Purandhar, Keshaboina Sreenath
  • PREPARATION OF AMORPHOUS HYDROUS ESOMEPRAZOLE MAGNESIUM
    Publication number: 20100016606
    Abstract: A hydrate of esomeprazole magnesium in the form of an amorphous solid is provided. Methods of preparation and use of, as well as formulation containing the hydrate of esomeprazole magnesium in the form of an amorphous solid are also provided.
    Type: Application
    Filed: September 28, 2009
    Publication date: January 21, 2010
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Manne Satyanarayana Reddy, Muppa Kishore Kumar, Koilkonda Purandhar, Keshaboina Sreenath
  • Amorphous hydrous esomeprazole magnesium
    Patent number: 7612098
    Abstract: A hydrate of esomeprazole magnesium in the form of an amorphous solid is provided. Methods of preparation and use of, as well as formulation containing the hydrate of esomeprazole magnesium in the form of an amorphous solid are also provided.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: November 3, 2009
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Manne Satyanarayana Reddy, Muppa Kishore Kumar, Koilkonda Purandhar, Keshaboina Sreenath
  • Process for preparation of optically pure or optically enriched sulfoxide compounds, including amorphous esomeprazole and salts thereof
    Patent number: 7169793
    Abstract: A process of preparation of optically pure or optically enriched isomers of omeprazole and structurally related sulfoxides is provided. Also provided are an amorphous form of esomeprazole, as well a pharmaceutical composition containing it and a method of using it for treatment of gastric disorders.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: January 30, 2007
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Manne Satyanarayana Reddy, Muppa Kishore Kumar, Kikkuru Srirami Reddy, Koilkonda Purandhar, Keshaboina Sreenath
  • Crystalline form of oxcarbazepine
    Publication number: 20060166968
    Abstract: Crystalline form F of oxcarbazepine.
    Type: Application
    Filed: July 15, 2005
    Publication date: July 27, 2006
    Inventors: Sundaram Venkataraman, Nadimpally Raju, Koilkonda Purandhar, Bairy Reddy, Lekkala Reddy, Golla Mala Kondaiah
  • Process for the preparation of crystalline form-1 of 4-hydroxy-2-methyl-N-(5-methyl-2-thiazolyl)-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxide
    Publication number: 20060025408
    Abstract: The present invention is related to an improved process for preparing crystalline Form I of meloxicam, which produces the Form I in high yield.
    Type: Application
    Filed: August 2, 2004
    Publication date: February 2, 2006
    Inventors: Sundaram Venkataraman, Muppa Kumar, Koilkonda Purandhar, Bairy Reddy, Lekkala Reddy, Golla Kondaiah, Keshaboina Sreenath
  • Process for preparing losartan
    Publication number: 20060020005
    Abstract: A process for preparing losartan, comprising reacting trityl losartan with an aqueous acid.
    Type: Application
    Filed: July 21, 2005
    Publication date: January 26, 2006
    Inventors: Nadimpally Satyavarahala Raju, Koilkonda Purandhar, Suthrapu Sashikanth, Lekkala Amarnath, Vecha Sravanthi, Golla Kondaiah
  • Method for preparing diaryl-substituted isoxazole compounds
    Publication number: 20050182113
    Abstract: The present invention relates to a process for preparing diaryl-substituted isoxazole using compounds of Formula (V) and Formula (VII): where Y is and to processes for preparing valdecoxib and parecoxib.
    Type: Application
    Filed: December 29, 2004
    Publication date: August 18, 2005
    Inventors: Venkataraman Sundaram, Anuradha Bhimireddy, Sajja Eswaraiah, Gilla Goverdhan, Koilkonda Purandhar, Surasani Rajendra, Nadimpally Raju, Anumula Reddy, Lekkala Reddy, Emani Reddy, Padi Reddy, Alla Sampath, Vecha Sravanthi
  • Crystalline esomeprazole compounds and process for the preparation thereof
    Publication number: 20040242642
    Abstract: The present invention relates to crystalline form II of esomeprazole trihydrate and methods of its preparation and use. Preferably, the crystalline form II of esomeprazole trihydrate has an X-ray powder diffraction pattern that includes five or more peaks with 2 theta angles of 4.82±0.09, 5.55±0.09, 7.41±0.09, 8.60±09, 12.10±0.09, 14.16±0.09, 18.47±0.09, and 21.08±0.09.
    Type: Application
    Filed: November 18, 2003
    Publication date: December 2, 2004
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Manne Satyanarayana Reddy, Muppa Kishore Kumar, Koilkonda Purandhar, Lekkala Amarnath Reddy
  • Amorphous hydrates of esomeprazole magnesium and process for the preparation thereof
    Publication number: 20040167173
    Abstract: A hydrate of esomeprazole magnesium in the form of an amorphous solid is provided. Methods of preparation and use of, as well as formulation containing the hydrate of esomeprazole magnesium in the form of an amorphous solid are also provided.
    Type: Application
    Filed: August 28, 2003
    Publication date: August 26, 2004
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Manne Satyanarayana Reddy, Muppa Kishore Kumar, Koilkonda Purandhar, Keshaboina Sreenath
  • Process for preparation of optically pure or optically enriched sulfoxide compounds, including amorphous esomeprazole and salts thereof
    Publication number: 20040077869
    Abstract: A process of preparation of optically pure or optically enriched isomers of omeprazole and structurally related sulfoxides is provided. Also provided are an amorphous form of esomeprazole, as well a pharmaceutical composition containing it and a method of using it for treatment of gastric disorders.
    Type: Application
    Filed: June 27, 2003
    Publication date: April 22, 2004
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Manne Satyanarayana Reddy, Muppa Kishore Kumar, Kikkuru Srirami Reddy, Koilkonda Purandhar, Keshaboina Sreenath