Patents by Inventor Amarnath Reddy Lekkala

Amarnath Reddy Lekkala 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 THE PREPARATION OF ROXADUSTAT AND ITS INTERMEDIATES
    Publication number: 20200299242
    Abstract: The present invention provides the process for the preparation of Roxadustat and its intermediates. Another aspect of the present invention provides a process for preparation of ethyl-5-(2-butoxycarbonyl)-4-phenoxyphenyl) oxazole-4-carboxylate of the formula (X) and its use in the preparation of Roxadustat. Another aspect of the present invention provides a process for the preparation of ethyl-4-hydroxy-1-methyl-7-phenoxyisoquinoline-3-carboxylate of the formula (XIII) and its use in the preparation of Roxadustat.
    Type: Application
    Filed: November 30, 2018
    Publication date: September 24, 2020
    Inventors: Amarnath Reddy LEKKALA, Jaydeepkumar DAHYABHAI LILAKAR, Mohammad AASEEF, Rehani Rajeev BUDHDEV, Sekhar Munaswamy NARIYAM, Rakeshwar BANDICHHOR, Sharad Santu PACHORE, Soma Rani SARKAR, Babu IRENI, Deep MALA, Kiran Kumar DONIPARTHI, Venkata Krishna Rao BADARLA
  • PROCESS FOR PREPARATION OF APREMILAST AND ITS INTERMEDIATES
    Publication number: 20180334429
    Abstract: Present application relates to the process for the preparation of 1-(3-Ethoxy-4-methoxy-phenyl)-2-methanesulf-onyl-ethylamine of the formula (II), its resolution and its use in preparation of Apremilast of formula (I), process for the preparation of crystalline form B of apremilast, process for preparation of amorphous form of apremilast and the crystalline form of (S)-1-(3-Eth-oxy-4-methoxy-phenyl)-2-methanesulfonyl-ethylamine of the formula (Va).
    Type: Application
    Filed: June 8, 2016
    Publication date: November 22, 2018
    Inventors: Sree Naga Venkata Lakshmi Vara Prasad VAKAMUDI, Syam Kumar Unniaran KUNHIMON, Soma Rani SARKAR, Babu IRENI, Amarnath Reddy LEKKALA, Gangadhara Chary RAPAKA, Srinivasa Rao MADARAPU, Ramesh Kumar NADGOUD, Sridhar CHAGANTI, Venkateswarlu MUVVA, Anna FRYSZKOWSKA, Martin FOX, Tamara Fanjul SOLARES, Vijay Kumar SHANGAPU, Nilesh HASTAK, Sunitha VYALA, Srininvasulu RANGINENI
  • Preparation of crystalline bazedoxifene and its salts
    Patent number: 9212172
    Abstract: Aspects of the present disclosure include crystalline bazedoxifene free base, crystalline bazedoxifene acetate Form D, and processes for their preparation. The drug compound having the adopted name “bazedoxifene acetate” has a chemical name 1-[4-(2-azepan-1-yl-ethoxy)benzyl]-2-(4-hydroxyphenyl)-3-methyl-1H-indol-5-ol acetic acid, and has the chemical structure shown below as Formula I.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: December 15, 2015
    Assignees: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Sundra Lakshmi Kanniah, Rajesham Boge, Peddireddy Subbareddy, Lalita Kanwar, Srividya Ramakrishnan, Ramya Kumar, Rakeshwar Bandichhor, Amarnath Reddy Lekkala, Ravi Kumar Mylavarapu, Vagwala Raghunath
  • PREPARATION OF CRYSTALLINE BAZEDOXIFENE AND ITS SALTS
    Publication number: 20130225805
    Abstract: Aspects of the present disclosure include crystalline bazedoxifene free base, crystalline bazedoxifene acetate Form D, and processes for their preparation. The drug compound having the adopted name “bazedoxifene acetate” has a chemical name 1-[4-(2-azepan-1-yl-ethoxy)benzyl]-2-(4-hydroxyphenyl)-3-methyl-1H-indol-5-ol acetic acid, and has the chemical structure shown below as Formula I.
    Type: Application
    Filed: September 14, 2011
    Publication date: August 29, 2013
    Applicants: DR. REDDY'S LABORATORIES, INC., DR. REDDY'S LABORATORIES LTD.
    Inventors: Sundra Lakshmi Kanniah, Rajesham Boge, Peddireddy Subbareddy, Lalita Kanwar, Srividya Ramakrishnan, Ramya Kumar, Rakeshwar Bandichhor, Amarnath Reddy Lekkala, Ravi Kumar Mylavarapu, Vagwala Raghunath
  • Polymorphic forms of esomeprazole sodium
    Patent number: 8063074
    Abstract: Polymorphic crystalline Forms J, K, L, M, and N of esomeprazole sodium.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: November 22, 2011
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Vijayabhaskar Bolugoddu, Amarnath Reddy Lekkala, Saurabh Shashikant Chitre, Srinivas Reddy Mamilla, Venkata Annapurna Sasikala Cheemalapati, Siva Prasad Reddy Seerapu
  • POLYMORPHIC FORMS OF ESOMEPRAZOLE SODIUM
    Publication number: 20070259921
    Abstract: Polymorphic crystalline Forms J, K, L, M, and N of esomeprazole sodium.
    Type: Application
    Filed: April 30, 2007
    Publication date: November 8, 2007
    Inventors: Vijayabhaskar Bolugoddu, Amarnath Reddy Lekkala, Saurabh Shashikant Chitre, Srinivas Reddy Mamilla, Venkata Annapurna Sasikala Cheemalapati, Siva Prasad Reddy Seerapu