Patents by Inventor Sathish Kumar Raman Viswanathan

Sathish Kumar Raman Viswanathan 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).

  • Salts and hydrates of antipsychotics
    Patent number: 9580414
    Abstract: The present invention relates to a novel salt of (3aR,4S,7R,7aS)-2-[((1R,2R)-2-{[4-(1,2-benzisothiazol-3-yl)-piperazin-1-yl]methyl}cyclohexyl)methyl]hexahydro-1H-4,7-methanisoindol-1,3-dione and hydrates thereof, to methods for preparing the novel salt and its hydrates. In one aspect, the present invention provides a compound which is lurasidone dihydrochloride. In another aspect, the present invention provides a process for preparation of lurasidone dihydrochloride comprising: (i) mixing lurasidone free base in an organic solvent system; (ii) subjecting step (i) mixture to acid proton source; and (iii) isolating compound of lurasidone dihydrochloride.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: February 28, 2017
    Assignee: Shasun Pharmaceuticals Limited
    Inventors: Vijayabaskar Veerappan, Srimurugan Sankareswaran, Sathish Kumar Raman Viswanathan, N. Subramanian
  • SALTS AND HYDRATES OF ANTIPSYCHOTICS
    Publication number: 20150175596
    Abstract: The present invention relates to a novel salt of (3aR,4S,7R,7aS)-2-[((1R,2R)-2-{[4-(1,2-benzisothiazol-3-yl)-piperazin-1-yl]methyl}cyclohexyl)methyl]hexahydro-1H-4,7-methanisoindol-1,3-dione and hydrates thereof, to methods for preparing the novel salt and its hydrates. In one aspect, the present invention provides a compound which is lurasidone dihydrochloride. In another aspect, the present invention provides a process for preparation of lurasidone dihydrochloride comprising: (i) mixing lurasidone free base in an organic solvent system; (ii) subjecting step (i) mixture to acid proton source; and (iii) isolating compound of lurasidone dihydrochloride.
    Type: Application
    Filed: July 18, 2013
    Publication date: June 25, 2015
    Inventors: Vijayabaskar Veerappan, Srimurugan Sankareswaran, Sathish Kumar Raman Viswanathan, N. Subramanian