Patents by Inventor Sujit Roy

Sujit Roy 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 diorganotrisulfide
    Patent number: 6555712
    Abstract: The present invention discloses a process for the preparation of a diorganotrisulfide said process by reacting an organic halide and elemental sulfur (&agr;-rhombic) using catalytic copper (II) halide and tin (II) halide in a mixture of organic solvents at 30-70° C.
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: April 29, 2003
    Assignees: Indian Institute of Technology, Council of Scientific and Industrial Research
    Inventors: Pradipta Sinha, Sujit Roy
  • Process for the preparation of diorganotrisulfide
    Publication number: 20020198410
    Abstract: The present invention discloses a process for the preparation of a diorganotrisulfide said process by reacting an organic halide and elemental sulfur (&agr;-rhombic) using catalytic copper (II) halide and tin (II) halide in a mixture of organic solvents at 30-70° C.
    Type: Application
    Filed: March 28, 2001
    Publication date: December 26, 2002
    Applicant: INDIAN INSTITUTE OF TECHNOLOGY
    Inventors: Pradipta Sinha, Sujit Roy
  • Process for the preparation of organotin compounds useful as cytotoxic agents
    Patent number: 5929238
    Abstract: The present invention is drawn to complexes of dibenzyl-organotin compounds having nitrogen or sulfur containing heterocyclic ligands. Said complexes are useful as cytotoxic agents.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: July 27, 1999
    Assignee: Council of Scientific & Industrial Research
    Inventors: Sujit Roy, Purnima M. Samuel, Prakash V. Diwan, P. Kanta Rao, U. T. Bhalerao
  • Process for the preparation of organotin compounds useful as cytotoxic agents
    Patent number: 5877320
    Abstract: The present invention is drawn to complexes of dibenzyl-organotin compounds having nitrogen or sulfur containing heterocyclic ligands. Said complexes are useful as cytotoxic agents.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: March 2, 1999
    Assignee: Council of Scientific and Industrial Research
    Inventors: Sujit Roy, Purnima M. Samuel, Prakash V. Diwan, P. Kanta Rao, Uday T. Bhalerao