Patents by Inventor Siddharth Sankar RAY

Siddharth Sankar RAY 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 selective production of N-methyl-2-pyrrolidone (NMP)
    Patent number: 10308603
    Abstract: This invention relates to an improved process for the selective production of N-methyl pyrrolidone (NMP) from gamma-butyrolactone and monomethyl amine preferably in aqueous form in the presence of a catalyst under comparatively milder conditions than the processes well known in the prior art of literature. The process is economically viable as it provides higher yield and selectivity for NMP which reduces the cost of separation of NMP from GBL. The catalyst shows good recyclability without significant loss in catalytic activity and no frequent regeneration is required.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: June 4, 2019
    Assignee: Council of Scientific & Industrial Research
    Inventors: Indrajit Kumar Ghosh, Suman Lata Jain, Praveen Kumar Khatri, Siddharth Sankar Ray, Madhukar Onkarnath Garg
  • Process for the Selective Production of N-Methyl-2-Pyrrolidone (NMP)
    Publication number: 20180222859
    Abstract: This invention relates to an improved process for the selective production of N-methyl pyrrolidone (NMP) from gamma-butyrolactone and monomethyl amine preferably in aqueous form in the presence of a catalyst under comparatively milder conditions than the processes well known in the prior art of literature. The process is economically viable as it provides higher yield and selectivity for NMP which reduces the cost of separation of NMP from GBL. The catalyst shows good recyclability without significant loss in catalytic activity and no frequent regeneration is required.
    Type: Application
    Filed: May 17, 2016
    Publication date: August 9, 2018
    Inventors: Indrajit Kumar GHOSH, Suman Lata JAIN, Praveen Kumar KHATRI, Siddharth Sankar RAY, Madhukar Onkarnath GARG