Patents by Inventor Satyananda Misra

Satyananda Misra 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 TOLTERODINE
    Publication number: 20040249211
    Abstract: The present invention relates to a cost effective and industrially advantageous process for the preparation of tolterodine and pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: May 18, 2004
    Publication date: December 9, 2004
    Inventors: Yatendra Kumar, Mohan Prasad, Praveen Kumar Neela, Satyananda Misra
  • Process for the preparation of tolterodine
    Patent number: 6822119
    Abstract: The present invention relates to a cost effective and industrially advantageous process for the preparation of tolterodine and pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: November 23, 2004
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Yatendra Kumar, Mohan Prasad, Praveen Kumar Neela, Satyananda Misra
  • Process for manufacturing simvastatin from lovastatin or mevinolinic acid
    Patent number: 5763646
    Abstract: A process for preparing simvastatin from lovastatin or mevinolinic acid in salt form comprises treating either starting material with cyclopropyl or butyl amine, the pyranone ring thereby being opened when lovastatin is the starting material, adding a methyl group to the 2-methylbutyrate side chain, and thereafter closing the open pyranone ring to produce simvastatin. The process is performed without protecting and deprotecting the two hydroxy groups of the open pyranone ring. In a preferred embodiment, the starting material is treated with cyclopropyl amine which produces simvastatin via the novel intermediate lovastatin cyclopropyl amide.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: June 9, 1998
    Assignee: Ranbaxy Laboratories, Ltd.
    Inventors: Yatendra Kumar, Rajesh Kumar Thaper, Satyananda Misra, S. M. Dileep Kumar, Jag Mohan Khanna
  • Key intermediates in the manufacture of simvastatin
    Patent number: 5763653
    Abstract: A process for preparing simvastatin from lovastatin or mevinolinic acid in salt form comprises treating either starting material with cyclopropyl or butyl amine, the pyranone ring thereby being opened when lovastatin is the starting material, adding a methyl group to the 2-methylbutyrate side chain, and thereafter closing the open pyranone ring to produce simvastatin. The process is performed without protecting and deprotecting the two hydroxy groups of the open pyranone ring. In a preferred embodiment, the starting material is treated with cyclopropyl amine which produces simvastatin via the novel intermediate lovastatin cyclopropyl amide.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: June 9, 1998
    Assignee: Ranbaxy Laboratories, Ltd.
    Inventors: Jag Mohan Khanna, Yatendra Kumar, Rajesh Kumar Thaper, Satyananda Misra, S. M. Dileep Kumar