Patents by Inventor Srinivas Polavarapu

Srinivas Polavarapu 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).

  • Processes for the preparation of sitagliptin and pharmaceutically acceptable salts thereof
    Patent number: 8969558
    Abstract: There is provided a process for preparation of sitagliptin of Formula II or a pharmaceutically acceptable salt thereof by deprotection of Formula IX.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: March 3, 2015
    Assignee: Dr. Reddy's Laboratories Limited
    Inventors: Pratap Reddy Padi, Babu Ireni, Srinivas Polavarapu, Shailaja Padamata, Kavitha Nerella, Vijaya Anand Ramasamy, Ranga Reddy Vangala
  • Asenapine maleate
    Patent number: 8779161
    Abstract: Aspects of the present application relate to a microcrystalline monoclinic form of asenapine maleate represented by structural Formula (I); processes for its preparation; and pharmaceutically acceptable dosage forms thereof.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: July 15, 2014
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Srinivas Katkam, Srinivas Polavarapu, Venkata Madhavi Yaddanapudi, Krishna Vinigari, Narasimha Rao Pagadala, Rajeshwar Reddy Sagyam
  • PROCESSES FOR THE PREPARATION OF SITAGLIPTIN AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF
    Publication number: 20140128607
    Abstract: There is provided salts and polymorphs of sitagliptin, processes for the preparation thereof, and pharmaceutical compositions comprising the same.
    Type: Application
    Filed: December 5, 2013
    Publication date: May 8, 2014
    Applicants: Dr. Reddy's Laboratories, Inc., Dr. Reddy's Laboratories Limited
    Inventors: Pratap Reddy Padi, Babu Ireni, Srinivas Polavarapu, Shailaja Padamata, Kavitha Nerella, Vijaya Anand Ramasamy, Ranga Reddy Vangala
  • ASENAPINE MALEATE
    Publication number: 20130211099
    Abstract: Aspects of the present application relate to a microcrystalline monoclinic form of asenapine maleate represented by structural Formula (I); processes for its preparation; and pharmaceutically acceptable dosage forms thereof.
    Type: Application
    Filed: June 16, 2011
    Publication date: August 15, 2013
    Applicants: DR. REDDY'S LABORATORIES, INC., DR. REDDY'S LABORATORIES LTD.
    Inventors: Srinivas Katkam, Srinivas Polavarapu, Venkata Madhavi Yaddanapudi, Krishna Vinigari, Narasimha Rao Pagadala, Rajeshwar Reddy Sagyam
  • Processes for the preparation of sitagliptin and pharmaceutically acceptable salts thereof
    Patent number: 8309724
    Abstract: There is provided an improved process for the preparation of Sitagliptin of Formula II by reduction of compound of Formula VIII to Formula IX followed by deprotection of Formula IX to afford Sitagliptin of Formula II.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: November 13, 2012
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Incorporated
    Inventors: Pratap Reddy Padi, Babu Ireni, Srinivas Polavarapu, Shailaja Padamata, Kavitha Nerella, Vijaya Anand Ramasamy, Ranga Reddy Vangala
  • PROCESSES FOR THE PREPARATION OF SITAGLIPTIN AND PHARMACEUTICLLY ACCEPTABLE SALTS THEREOF
    Publication number: 20100274017
    Abstract: There is provided salts and polymorphs of sitagliptin, processes for the preparation thereof, and pharmaceutical compositions comprising the same.
    Type: Application
    Filed: December 18, 2008
    Publication date: October 28, 2010
    Applicants: DR. REDDY'S LABORATORIES LTD., DR. REDDY'S LABORATORIES, INC.
    Inventors: Pratap Reddy Padi, Babu Ireni, Srinivas Polavarapu, Shailaja Padamata, Kavitha Nerella, Vijaya Anand Ramasamy, Ranga Reddy Vangala
  • PROCESSES FOR THE PREPARATION OF PRASUGREL , AND ITS SALTS AND POLYMORPHS
    Publication number: 20100261908
    Abstract: Processes for the preparation of prasugrel and its pharmaceutically acceptable salts thereof. Also disclosed are polymorphic forms of prasugrel hydrochloride and processes for their preparation.
    Type: Application
    Filed: November 7, 2008
    Publication date: October 14, 2010
    Applicants: DR. REDDY'S LABORATORIES LTD., DR. REDDY'S LABORATORIES, INC.
    Inventors: Pratap Reddy Padi, Seetha Rama Sarma Peri, Madhusudhan Reddy Ganta, Srinivas Polavarapu, Praveen Cherukupally, Babu Ireni, Shailaja Padamata, Krishna Jonnada, Krishna Vinigari, Kavitha Nerella
  • Crystalline form of N-(trans-4-isopropylcyclohexane carbonyl)-D-phenylalanine and process for preparation thereof
    Publication number: 20040077725
    Abstract: A new crystalline form of nateglinide is provided. The new crystalline form is described by X-ray powder diffraction. Processes for making the new crystalline form of nateglinide are also provided.
    Type: Application
    Filed: August 27, 2003
    Publication date: April 22, 2004
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Buchi Reddy Reguri, Rajasekhar Kadaboina, Srinivas Polavarapu