Patents by Inventor Tushar Rajnikant Shah

Tushar Rajnikant Shah 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 Rivastigmine
    Patent number: 7683205
    Abstract: The present invention relates to an improved process for preparation of Rivastigmine of formula (I) or pharmaceutically acceptable salts thereof comprising a step of N-methylation of compound of formula (III), wherein R1=R2=H or R1=H and R2=CH3 or an acid addition salt thereof, using paraformaldehyde in the presence of Raney Nickel and hydrogen in a suitable solvent to obtain compound of formula (II).
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: March 23, 2010
    Assignee: Alembic Limited
    Inventors: Pandurang Balwant Deshpande, Kishore Khemani, Bharat Becharbhai Boda, Tushar Rajnikant Shah, Hitarth Harshendu Acharya, Parven Kumar Luthra
  • Process for the preparation of Rivastigmine
    Publication number: 20080045743
    Abstract: The present invention relates to an improved process for preparation of Rivastigmine of formula (I) or pharmaceutically acceptable salts thereof comprising a step of N-methylation of compound of formula (III), wherein R1=R2=H or R1=H and R2=CH3 or an acid addition salt thereof, using paraformaldehyde in the presence of Raney Nickel and hydrogen in a suitable solvent to obtain compound of formula (II).
    Type: Application
    Filed: October 31, 2006
    Publication date: February 21, 2008
    Applicant: ALEMBIC LIMITED
    Inventors: Pandurang Balwant Deshpande, Kishore Khemani, Bharat Becharbhai Boda, Tushar Rajnikant Shah, Hitarth Harshendu Acharya, Parven Kumar Luthra