Patents by Inventor Raja Sen

Raja Sen 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 preparing a catalyst for conversion of cyanopyridines to nicotinamides
    Patent number: 7455827
    Abstract: Nicotinamides and isonicotinamides, used in the preparation of anti-TB drugs i.e. isoniazid and as an intermediate of vitamin B12 are prepared from cyanopyridines and nicotinamides. Catalysts useful for the preparation of nicotinamide and isonicotinamide.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: November 25, 2008
    Assignee: Council of Scientific and Industrial Research
    Inventors: Subhash Chandra Ray, Baldev Singh, Hiralal Prasad, Prodyot Kumar Sarkar, Pashupati Dutta, Shyam Kishore Roy, Anup Kumar Bandyopadhyay, Raja Sen
  • Process for conversion of cyanopyridines to nicotinamides and catalyst therefor, process for preparing said catalyst
    Patent number: 7345176
    Abstract: The present invention relates to an improved process for conversion of cyanopyridines to nicotinamides. More particularly the present invention relates to preparation of nicotinamides and isonicotinamides which finds its usage in the preparation of anti-TB drug i.e. isoniazid and as an intermediate of vitamin B12. The present invention also relates to a process for a catalyst useful for the preparation of nicotinamide and isonicotinamide.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: March 18, 2008
    Assignee: Council of Scientific and Industrial Research
    Inventors: Subhash Chandra Ray, Baldev Singh, Hiralal Prasad, Prodyot Kumar Sarkar, Pashupati Dutta, Shyam Kishore Roy, Anup Kumar Bandyopadhyay, Raja Sen
  • Process for conversion of cyanopyridines to nicotinamides and catalyst therefor, process for preparing said catalyst
    Publication number: 20060155131
    Abstract: The present invention relates to an improved process for conversion of cyanopyridines to nicotinamides. More particularly the present invention relates to preparation of nicotinamides and isonicotinamides which finds its usage in the preparation of anti-TB drug i.e. isoniazid and as an intermediate of vitamin B12. The present invention also relates to a process for a catalyst useful for the preparation of nicotinamide and isonicotinamide.
    Type: Application
    Filed: January 24, 2006
    Publication date: July 13, 2006
    Applicant: COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
    Inventors: Subhash Chandra Ray, Baldev Singh, Hiralal Prasad, Prodyot Sarkar, Pashupati Dutta, Shyam Roy, Anup Bandyopadhyay, Raja Sen
  • Detergent-free scouring composition
    Patent number: 6969699
    Abstract: The present invention provides a low foaming scouring powder composition, said composition comprising fly ash as an abrasive agent ranges between 40 and 75%, an surfactant ranges between 3 and 6%, an alkali metal carbonate ranges between 10 and 20 %, an alkali metal bicarbonate ranges between 3 and 15%, an alkali halide ranges between 1 and 10 %, clay ranges between 5 to 50% and optionally traces of perfumes and colors and a process for preparing the above said composition.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: November 29, 2005
    Assignee: Council of Scientific & Industrial Research
    Inventors: Raja Sen, Ujjal Bhattacharjee, Deba Priya Choudhury, Lakshmi Narayan Nandi, Saikat Maitra
  • Process for conversion of cyanopyridines to nicotinamides and catalyst therefor, process for preparing said catalyst
    Publication number: 20050209461
    Abstract: The present invention relates to an improved process for conversion of cyanopyridines to nicotinamides. More particularly the present invention relates to preparation of nicotinamides and isonicotinamides which finds its usage in the preparation of anti-TB drug i.e. isoniazid and as an intermediate of vitamin B12. The present invention also relates to a process for a catalyst useful for the preparation of nicotinamide and isonicotinamide.
    Type: Application
    Filed: May 9, 2005
    Publication date: September 22, 2005
    Applicant: Council of Scientific and Industrial Research
    Inventors: Subhash Ray, Baldev Singh, Hiralal Prasad, Prodyot Sarkar, Pashupati Dutta, Shyam Roy, Anup Bandyopadhyay, Raja Sen
  • Process for conversion of cyanopyridines to nicotinamides and catalyst therefor, process for preparing said catalyst
    Publication number: 20040186297
    Abstract: The present invention relates to an improved process for conversion of cyanopyridines to nicotinamides More particularly the present invention relates to preparation of nicotinamides and isonicotinamides which finds its usage in the preparation of anti-TB drug i.e. isoniazid and as an intermediate of vitamin B12. The present invention also relates to a process for a catalyst useful for the preparation of nicotinamide and isonicotinamide.
    Type: Application
    Filed: March 20, 2003
    Publication date: September 23, 2004
    Inventors: Subhash Chandra Ray, Baldev Singh, Hiralal Prasad, Prodyot Kumar Sarkar, Pashupati Dutta, Shyam Kishore Roy, Anup Kumar Bandyopadhyay, Raja Sen