Patents by Inventor Sumit Kar

Sumit Kar 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 Isosulphan Blue
    Patent number: 7534911
    Abstract: A process for the preparation of Isosulphan Blue is disclosed. The process comprises the following steps: Sulphonating orthochlorobenzaldehyde, treatment with sodium sulphite, basification, condensation and oxidation to obtain Isosulphan Blue.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: May 19, 2009
    Assignee: Innovassynth Technologies (India) Ltd.
    Inventors: Balkrishna K Kulkarni, Sankar Chinnakulandai, Girish M Khandekar, Hawaldar T. Maurya, Ashok Vamanrao Arjun, Sandeep S. Sope, Sumit Kar
  • A PROCESS FOR THE PREPARATION OF ISOSULPHAN BLUE
    Publication number: 20060224003
    Abstract: A process for the preparation of Isosulphan Blue is disclosed. The process comprises the following steps: Sulphonating orthochlorobenzaldehyde, treatment with sodium sulphite, basification, condensation and oxidation to obtain Isosulphan Blue.
    Type: Application
    Filed: April 4, 2006
    Publication date: October 5, 2006
    Inventors: BALKRISHNA KULKARNI, SANKAR CHINNAKULANDAI, GIRISH KHANDEKAR, HAWALDAR MAURYA, ASHOK ARJUN, SANDEEP SOPE, SUMIT KAR