Patents by Inventor Srinivas Gangula

Srinivas Gangula 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 PREPARATION OF PREGABALIN
    Publication number: 20140243412
    Abstract: Aspects of the present invention relate to improved process for preparation of (R)(?)-3-(carbamoylmethyl)-5-methylhexanoic acid (R-CMHA) of the formula (II) or its pharmaceutically acceptable salts in the presence of a lewis acid, process for preparation of pregabalin using R-CMHA of the formula (II) or its pharmaceutically acceptable salts prepared according to the present invention and process for preparation of pregabalin with low amount of undesired impurity.
    Type: Application
    Filed: February 27, 2014
    Publication date: August 28, 2014
    Applicant: Dr. Reddy's Laboratories Ltd.
    Inventors: Srinivas GANGULA, Uday Kumar NEELAM, Krishna VINIGARI, Vilas Hareshwar DAHANUKAR, Syam Kumar Unniaran KUNHIMON, Srinivas Reddy GADE
  • 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
  • Preparation of aprepitant
    Patent number: 8133994
    Abstract: A process for preparing aprepitant.
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: March 13, 2012
    Assignees: Dr. Reddy's Laboratories Ltd., Dr. Reddy's Laboratories, Inc.
    Inventors: Pravinchandra Jayantilal Vankawala, Ravi Ram Chandrasekhar Elati, Naveen Kumar Kolla, Subrahmanyeswara Rao Chlamala, Srinivas Gangula
  • PREPARATION OF DECITABINE
    Publication number: 20120046457
    Abstract: The present application relates to processes for the preparation and purification of decitabine structurally represented by formula (I): and to processes for the preparation of a crystalline form of decitabine.
    Type: Application
    Filed: October 27, 2011
    Publication date: February 23, 2012
    Applicants: DR. REDDY'S LABORATORIES, INC., DR. REDDY'S LABORATORIES LTD.
    Inventors: Naveen Kumar Kolla, Uday Kumar Neelam, Sudhakar Reddy Baddam, Srinivas Gangula
  • PREPARATION OF APREPITANT
    Publication number: 20110094321
    Abstract: A process for preparing aprepitant.
    Type: Application
    Filed: October 6, 2006
    Publication date: April 28, 2011
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Pravinchandra Jayantilal Vankawala, Ravi Ram Chandrasekhar Elati, Naveen Kumar Kolla, Subrahmanyeswara Rao Chlamala, Srinivas Gangula
  • DEXLANSOPRAZOLE PROCESS AND POLYMORPHS
    Publication number: 20110028518
    Abstract: Processes for the preparation of dexlansoprazole, an amorphous form of dexlansoprazole, a solid dispersion of amorphous dexlansoprazole and a pharmaceutically acceptable carrier, and processes for their preparation. Also provided are crystalline compounds 2-[(R)-[(4-chloro-3-methyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole and 2-[(R)-[(4-nitro-3-methyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole, and methods for their preparation.
    Type: Application
    Filed: March 18, 2009
    Publication date: February 3, 2011
    Applicants: DR. REDDY'S LABORATORIES LTD., DR. REDDY'S LABORATORIES, INC.
    Inventors: Naveen Kumar Kolla, Nagaraju Manne, Srinivas Gangula, Udaykumar Neelam, Anitha Naredla, Sudhakar Reddy Baddam, Sumeet Vishwasrao Patil, Arjunkumar Tummala, Subbareddy Peddireddy, Sachin Gulabrao Shinde, Ashok Sigala, Satish Varma Mudunuru, Madhu Kiran Tummidi
  • 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
  • ESCITALOPRAM OXALATE POWDERS
    Publication number: 20090048336
    Abstract: Escitalopram oxalate powders having definite particle size distribution parameters, processes for preparing the powders, and solid pharmaceutical formulations containing the powders.
    Type: Application
    Filed: August 18, 2008
    Publication date: February 19, 2009
    Inventors: Naveen Kumar Kolla, Ravi Ram Elati, Srinivas Gangula
  • PREPARATION OF ESCITALOPRAM
    Publication number: 20090018351
    Abstract: The present invention relates to a process for preparing enantiomerically enriched citalopram via methylating enantiomerically enriched didesmethylcitalopram, which is prepared by directly resolving racemic didesmethylcitalopram using a chiral acid.
    Type: Application
    Filed: November 12, 2004
    Publication date: January 15, 2009
    Applicants: DR. REDDY'S LABORATORIES, INC., DR. REDDY'S LABORATORIES LTD.
    Inventors: Venkataraman Sundaram, Vijayavithai Thippannachar Mathad, Pravinachandra Jayanthilal Venkavala, Chandrashekar Ravirama Elati, Naveenkumar Kolla, Shanmugam Govindan, Subrahmanyeshwara Rao Chalamala, Srinivas Gangula
  • Amorphous Aprepitant Coprecipitates
    Publication number: 20080214535
    Abstract: A coprecipitate comprising amorphous aprepitant and a pharmaceutically acceptable carrier is prepared by rapidly removing solvent from a solution containing aprepitant and the carrier.
    Type: Application
    Filed: July 31, 2006
    Publication date: September 4, 2008
    Applicants: DR. REDDY'S LABORATORIES LTD., DR. REDDY'S LABORATORIES, INC.
    Inventors: Vijayavitthal Thippannachar Mathad, Pravinchandra Vankawala Jayantilal, Chandrasekhar Ravi Ram Elati, Subrahmanyeswara Rao Chlamala, Naveen Kumar Kolla, Srinivas Gangula, Srirami Reddy Kikkuru, Srinivasan Neti, Raveendra Reddy Chinta
  • PROCESS FOR PREPARING FOSPHENYTOIN
    Publication number: 20070249563
    Abstract: Processes for preparing fosphenytoin.
    Type: Application
    Filed: April 20, 2007
    Publication date: October 25, 2007
    Inventors: Apurba Bhattacharya, Vijayabhaskar Bolugoddu, Pravinchandra Vankawala, Chandrasekhar Elati, Srinivas Gangula, Amarnath Lekkala, Ramakrishna Mallemula, Anitha Naredla, Ashok Sigala