Patents by Inventor Tonmoy Chitta DAS

Tonmoy Chitta DAS 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).

  • Crystalline forms of selinexor and process for their preparation
    Patent number: 10993943
    Abstract: The present disclosure relates to solid state forms of Selinexor, processes for preparation thereof and pharmaceutical compositions thereof.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: May 4, 2021
    Assignee: WATSON LABORATORIES INC.
    Inventors: Anantha Rajmohan Muthusamy, Sundara Lakshmi Kanniah, Akash Ravi, Tonmoy Chitta Das, Rajendra Popat Chemate, Anil Kumar Singh, Yogesh Dhananjay Wagh
  • Process for the preparation of intermediates useful in the synthesis of Eluxadoline
    Patent number: 10472329
    Abstract: The invention relates to an improved process for preparing [(S)-1-(4-phenyl-1-H-imidazol-2-yl)-ethyl]-amine. The process involves formation of the novel intermediate crystalline compound [(S)-1-(4-phenyl-1-H-imidazol-2-yl)-ethyl]-carbamic acid tert-butyl ester oxalate.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: November 12, 2019
    Assignee: Allergan Holdings Unlimited Company
    Inventors: Parven Kumar Luthra, Chandrasekhar Sinha, Syed Aziz Imam Quadri, Tonmoy Chitta Das
  • NOVEL CRYSTALLINE FORMS OF SELINEXOR AND PROCESS FOR THEIR PREPARATION
    Publication number: 20190336499
    Abstract: The present disclosure relates to solid state forms of Selinexor, processes for preparation thereof and pharmaceutical compositions thereof.
    Type: Application
    Filed: January 5, 2018
    Publication date: November 7, 2019
    Inventors: Anantha Rajmohan MUTHUSAMY, Sundara Lakshmi KANNIAH, Akash RAVI, Tonmoy Chitta DAS, Rajendra Popat CHEMATE, Anil Kumar SINGH, Yogesh Dhananjay WAGH
  • PROCESS FOR THE PREPARATION OF INTERMEDIATES USEFUL IN THE SYNTHESIS OF ELUXADOLINE
    Publication number: 20180029994
    Abstract: The invention relates to an improved process for preparing [(S)-1-(4-phenyl-1-H-imidazol-2-yl)-ethyl]-amine. The process involves formation of the novel intermediate crystalline compound [(S)-1-(4-phenyl-1-H-imidazol-2-yl)-ethyl]-carbamic acid tert-butyl ester oxalate.
    Type: Application
    Filed: February 22, 2016
    Publication date: February 1, 2018
    Inventors: Parven Kumar LUTHRA, Chandrasekhar SINHA, Syed Aziz Imam QUADRI, Tonmoy Chitta DAS