Patents by Inventor Trushar Rajanikant Shah

Trushar Rajanikant 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 purification of Ropinirole hydrochloride
    Patent number: 7968731
    Abstract: An improved process is described for the purification of ropinirole hydrochloride. The process includes (i) dissolving ropinirole hydrochloride in water; (ii) treating the solution obtained in step (i) with sodium dithionate and charcoal; (iii) treating the filtrate obtained in step (ii) with water immiscible solvent and base and isolating the free base; and (iv) treating the free base obtained in step (iii) with ethanolic HCl to give ropinirole hydrochloride.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: June 28, 2011
    Assignee: Alembic Limited
    Inventors: Pandurang Balwant Deshpande, Ashok Prataprai Shanishchara, Trushar Rajanikant Shah, Hitarth Harshendu Acharya, Parven Kumar Luthra
  • PROCESS FOR THE PURIFICATION OF ROPINIROLE HYDROCHLORIDE
    Publication number: 20100249433
    Abstract: An improved process is described for the purification of ropinirole hydrochloride. The process includes (i) dissolving ropinirole hydrochloride in water; (ii) treating the solution obtained in step (i) with sodium dithionate and charcoal; (iii) treating the filtrate obtained in step (ii) with water immiscible solvent and base and isolating the free base; and (iv) treating the free base obtained in step (iii) with ethanolic HCl to give ropinirole hydrochloride.
    Type: Application
    Filed: March 21, 2007
    Publication date: September 30, 2010
    Applicant: ALEMBIC LIMITED
    Inventors: Pandurang Balwant Deshpande, Ashok Prataprai Shanishchara, Trushar Rajanikant Shah, Hitarth Harshendu Acharya, Parven Kumar Luthra