Patents by Inventor Tarun Kumar Singh

Tarun Kumar Singh 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).

  • Co-crystal of dapagliflozin with citric acid
    Patent number: 9676741
    Abstract: The present invention relates to a dapagliflozin-citric acid co-crystal, processes for its preparation, and its use for the treatment of type 2 diabetes mellitus. A dapagliflozin citric acid co-crystal. The dapagliflozin citric acid co-crystal of claim 1, characterized by X-ray powder diffraction peaks having d-spacing values at about 3.89, 3.90, 4.01, 4.35, 5.77, and 5.80.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: June 13, 2017
    Assignee: SUN PHARMACEUTICAL INDUSTRIES LIMITED
    Inventors: Ramkinkar Santra, Tarun Kumar Singh, Ram Thaimattam, Mohan Prasad
  • CO-CRYSTAL OF DAPAGLIFLOZIN WITH CITRIC ACID
    Publication number: 20170158659
    Abstract: The present invention relates to a dapagliflozin-citric acid co-crystal, processes for its preparation, and its use for the treatment of type 2 diabetes mellitus. A dapagliflozin citric acid co-crystal. The dapagliflozin citric acid co-crystal of claim 1, characterized by X-ray powder diffraction peaks having d-spacing values at about 3.89, 3.90, 4.01, 4.35, 5.77, and 5.80.
    Type: Application
    Filed: June 23, 2015
    Publication date: June 8, 2017
    Inventors: Ramkinkar SANTRA, Tarun Kumar SINGH, Ram THAIMATTAM, Mohan PRASAD
  • PROCESS FOR THE PREPARATION OF 4-BROMO-1-CHLORO-2-(4-ETHOXYBENZYL)BENZENE
    Publication number: 20160280619
    Abstract: The present invention provides a process for the preparation of 4-bromo-1-chloro-2-(4-ethoxybenzyl)benzene of Formula III, which can be used as an intermediate for the preparation of dapagliflozin, or solvates thereof.
    Type: Application
    Filed: October 30, 2014
    Publication date: September 29, 2016
    Inventors: Suresh Babu JAYACHANDRA, Devendra Prakash NAGDA, Tarun Kumar SINGH
  • PROCESS FOR THE PURIFICATION OF DAPAGLIFLOZIN
    Publication number: 20160237054
    Abstract: The present invention provides a process for the preparation of (1C)-2,3,4,6-tetra-O-acetyl-1,5-anhydro-1-[4-chloro-3-(4-ethoxybenzyl)phenyl]-D-glucitol of Formula III. The invention also provides a process for the purification of dapagliflozin using (1C)-2,3,4,6-tetra-O-acetyl-1,5-anhydro-1-[4-chloro-3-(4-ethoxybenzyl)phenyl]-D-glucitol of Formula III.
    Type: Application
    Filed: September 19, 2014
    Publication date: August 18, 2016
    Applicant: SUN PHARMACEUTICAL INDUSTRIES LIMITED
    Inventors: Suresh Babu JAYACHANDRA, Devendra Prakash NAGDA, Tarun Kumar SINGH
  • PROCESS FOR THE PREPARATION OF DAPAGLIFLOZIN
    Publication number: 20160214953
    Abstract: The present invention provides an improved process for the preparation of dapagliflozin.of Formula (II) wherein the process comprises the step of hydrolyzing the compound of Formula (III) in the presence of an amine base.
    Type: Application
    Filed: September 18, 2014
    Publication date: July 28, 2016
    Inventors: Suresh Babu JAYACHANDRA, Devendra Prakash NAGDA, Tarun Kumar SINGH
  • PACKAGING FOR ALITRETINOIN
    Publication number: 20140262858
    Abstract: The present invention relates to the use of an oxygen absorber and silica gel desiccant in a vacuum-sealed pack for the reduction or prevention of oxidative degradation of alitretinoin.
    Type: Application
    Filed: October 19, 2012
    Publication date: September 18, 2014
    Inventors: Suresh Babu Jayachandra, Tarun Kumar Singh