Patents by Inventor Dhirenkumar N. Mistry

Dhirenkumar N. Mistry 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 synthesis of ramelteon and its intermediates
    Patent number: 8084630
    Abstract: The present invention provides processes and intermediates for the synthesis of ramelteon.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: December 27, 2011
    Assignee: Teva Pharmaceutical Industries Ltd.
    Inventors: Vinod Kumar Kansal, Dhirenkumar N. Mistry, Sanjay L. Vasoya, Michal Rafilovich, Elena Ben Moha-Lerman, Revital Lifshitz-Liron
  • PROCESS FOR THE SYNTHESIS OF RAMELTEON AND ITS INTERMEDIATES
    Publication number: 20100152468
    Abstract: The present invention provides processes and intermediates for the synthesis of ramelteon.
    Type: Application
    Filed: October 16, 2009
    Publication date: June 17, 2010
    Inventors: Vinod Kumar Kansal, Dhirenkumar N. Mistry, Sanjay L. Vasoya, Arpan M. Jadav, Pratish Dadhaniya, Jitendra Nalawade
  • PROCESS FOR THE SYNTHESIS OF RAMELTEON AND ITS INTERMEDIATES
    Publication number: 20090281176
    Abstract: A process for the preparation of ramelteon and intermediates useful in the process. The process suitable for industrial scale provides increased yield and/or greater purity with fewer process steps.
    Type: Application
    Filed: November 3, 2008
    Publication date: November 12, 2009
    Inventors: Vinod Kumar Kansal, Dhirenkumar N. Mistry, Sanjay L. Vasoya, Rakesh Patel, Arpan M. Jadav
  • Process for the preparation of clarithromycin
    Publication number: 20090054634
    Abstract: The present invention includes a process involving a one-pot reaction for preparing erythromycin 9-oxime salt comprising: (a) reacting erythromycin thiocyanate with an ammonium source to obtain erythromycin free base; (b) oximating the C-9 carbonyl of the erythromycin free base by reacting the erythromycin free base with triethylamine and hydroxyl amine hydrochloride to form erythromycin oxime; and (c) reacting the erythromycin oxime obtained in step (b) with an ammonium source to obtain the erythromycin 9-oxime salt.
    Type: Application
    Filed: August 11, 2008
    Publication date: February 26, 2009
    Inventors: Vinod Kumar Kansal, Dhirenkumar N. Mistry, Mitesh Gandhi, Rakesh Ravjibhai Patel
  • Process for preparing clopidogrel
    Publication number: 20080287679
    Abstract: The present invention encompasses processes for the preparation of optically pure clopidogrel camphorsulfonic acid salt without the need to isolate or recover (±) clopidogrel.
    Type: Application
    Filed: April 18, 2008
    Publication date: November 20, 2008
    Inventors: Vinod Kumar Kansal, Kompally Praveen, Dhirenkumar N. Mistry
  • Intermediates and processes for the synthesis of Ramelteon
    Publication number: 20080242877
    Abstract: Provided are intermediates and processes for preparation of Ramelteon.
    Type: Application
    Filed: February 26, 2008
    Publication date: October 2, 2008
    Inventors: Vinod Kumar Kansal, Dhirenkumar N. Mistry, Sanjay L. Vasoya