Patents by Inventor Shishupal Singh

Shishupal 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).

  • Process for the preparation of tetrofosmin or acid salt thereof
    Patent number: 10836781
    Abstract: The present invention relates to an improved process for the preparation of tetrofosmin or acid addition salt thereof. The present invention also relates to the process for the preparation of tetrofosmin disulfosalicylate salt. Further the present invention also provides the polymorphic form J of disulfosalicylate salt of tetrofosmin.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: November 17, 2020
    Assignee: JUBILANT GENERICS LIMITED
    Inventors: Mokkapati Umamaheshwar Prasad, Anjul Kumar, Shishupal Singh, Dharam Vir
  • AN IMPROVED PROCESS FOR THE PREPARATION OF TETROFOSMIN OR ACID ADDITION SALT THEREOF
    Publication number: 20190382423
    Abstract: The present invention relates to an improved process for the preparation of tetrofosmin or acid addition salt thereof. The present invention also relates to the process for the preparation of tetrofosmin disulfosalicylate salt. Further the present invention also provides the polymorphic form J of disulfosalicylate salt of tetrofosmin.
    Type: Application
    Filed: November 20, 2017
    Publication date: December 19, 2019
    Inventors: Mokkapati Umamaheshwar PRASAD, Anjul KUMAR, Shishupal SINGH, Dharam VIR
  • PROCESS FOR THE PREPARATION OF STABLE CRYSTALLINE FORM-I OF LINEZOLID, SUBSTANTIALLY FREE OF RESIDUAL SOLVENT
    Publication number: 20170066728
    Abstract: The invention relates to a process of preparation of enantiomerically pure Linezolid Form-I comprising converting a substantially enantiomerically pure linezolid hydroxide compound of formula II to Linezolid Form I compound of formula I.
    Type: Application
    Filed: November 18, 2016
    Publication date: March 9, 2017
    Inventors: Sujay BISWAS, Atulya Kumar PANDA, Ashish Kumar GUPTA, Shishupal SINGH, Praveen TIWARI, Dharam VIR, Saji THOMAS
  • PROCESS FOR THE PREPARATION OF STABLE CRYSTALLINE FORM-I OF LINEZOLID, SUBSTANTIALLY FREE OF RESIDUAL SOLVENT
    Publication number: 20150025236
    Abstract: The invention relates to a substantially pure linezolid hydroxide having R-isomer content more than about 99.9% relative to its S-isomer. Further aspect of invention provides the ambient moisture condition, which is critical for enantiomeric pure linezolid hydroxide. The obtained substantially enantiomerically pure linezolid hydroxide compound of formula-II can be subsequently converted into the linezolid compound of formula-I, having S-isomer content more than 99.9% relative to R-isomer. Further the invention provides an improved process for preparation of enantiomeric pure linezolid Form-I, wherein linezolid Form-I having the purity more than 99.9% relative to any other known polymorphic form of linezolid. The obtained enantiomeric pure linezolid Form-I can be subsequently converted into the other known polymorphic forms linezolid. The invention also provides stable and substantially solvent-free crystal of Form-I of linezolid.
    Type: Application
    Filed: January 22, 2013
    Publication date: January 22, 2015
    Inventors: Sujay Biswas, Atulya Kumar Panda, Ashish Kumar Gupta, Shishupal Singh, Praveen Tiwari, Dharam Vir, Saji Thomas