Patents by Inventor Surya Narayana Devarkonda

Surya Narayana Devarkonda 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).

  • Aprepitant polymorph mixtures
    Patent number: 8217039
    Abstract: Intimate mixtures of aprepitant crystalline Form I and crystalline Form II, having specific weight ratios of the forms.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: July 10, 2012
    Assignees: Dr. Reddy's Laboratories Ltd., Dr. Reddy's Laboratories, Inc.
    Inventors: Vijayavitthal Thippannachar Mathad, Pravinchandra Jayantilal Vankawala, Raviram Chandrasekhar Elati, Prabhakar Macharla, Srinivas Gangula, Naveen Kumar Kolla, Ravi Kumar Komareddy, Surya Narayana Devarkonda, Subbareddy Peddireddy
  • APREPITANT POLYMORPH MIXTURES
    Publication number: 20100298327
    Abstract: Intimate mixtures of aprepitant crystalline Form I and crystalline Form II, having specific Hweight ratios of the forms.
    Type: Application
    Filed: March 29, 2007
    Publication date: November 25, 2010
    Applicants: DR. REDDY'S LABORATORIES LTD., DR. REDDY'S LABORATORIES, INC.
    Inventors: Vijayavitthal Thippannachar Mathad, Pravinchandra Jayantilal Vankawala, Raviram Chandrasekhar Elati, Prabhakar Macharla, Srinivas Gangula, Naveen Kumar Kolla, Ravi Kumar Komareddy, Surya Narayana Devarkonda, Subbareddy Peddireddy
  • PROCESS FOR THE PREPARATION OF 5-(2-(4-(1,2-BENZISOTHIAZOL-3-YL)-1-PIPERAZINYL) ETHYL)-6-CHLORO-1, 3-DIHYDRO-2H-INDOL-2-ONE HYDROCHLORIDE (ZIPRASIDONE HYDROCHLORIDE) AND ITS INTERMEDIATE
    Publication number: 20090047354
    Abstract: The present invention relates to improved processes for the preparation of 5-(2-(4-(1,2-benzisothiazol-3-yl)-1-piperazinyl)ethyl)-6-chloro-1,3-dihydro-2H-indol-2-one and its hydrochloride, which is known as Ziprasidone hydrochloride of Formula (I) and 5-(2-Chloro acetyl)-6-chloro oxindole of Formula (IV), which is an intermediate for the preparation of 5-(2-chloro ethyl)-6-chloro oxindole of Formula (V). Ziprasidone hydrochloride of Formula (I) of the present invention is depicted by the following structure.
    Type: Application
    Filed: April 24, 2008
    Publication date: February 19, 2009
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Manne Satyanarayana Reddy, Sundaram Venkatraman, Srinivasan Thirumalai Rajan, Sharat Pandurang Narsapur, Manoj Ramesh Kharkar, Surya Narayana Devarkonda, Yarraguntla Sesha Reddy, Rangineni Srinivasulu, Deepak K. Shukla, Pushkar B. Lakhekar, Uppala Venkata Bhaskar Rao, Mummadi Venkatesh