Patents by Inventor Joshi Shreerang Vidyadhar

Joshi Shreerang Vidyadhar 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 1-benzyl-4(5,6-dimethoxy-1-indanon)-2-yl) methyl piperidine hydrochloride (Donepezil HCL)
    Patent number: 6649765
    Abstract: A process for the preparation of 1-benzyl-4-[(5,6-dimethoxy-1-indanon)-2-yl]methylpiperidine hydrochloride (Donepezil HCl). 5,6-Dimethoxy-2-(pyridin-4-yl)methylene inda-1-one is hydrogenated with a noble metal oxide catalyst in an organic solvent at 20-50° C. and 10-45 psi gauge pressure. The resulting 4-[(5,6-dimethoxy-1-indanon)-2-yl]methyl piperidine is alkylated with an alkylating agent in an organic solvent at 30-80° C.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: November 18, 2003
    Assignee: USV Limited, BSD MARG.
    Inventors: Joshi Shreerang Vidyadhar, Naidu Avinash Venkatraman, Sutar Rajiv Pandurang