Patents by Inventor Ashok Prasad

Ashok Prasad 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 an intermediate of tadalafil
    Patent number: 8445698
    Abstract: The present invention relates to a process for the preparation of cis-intermediate of Formula II, which is useful synthetic intermediates in the preparation of tadalafil.
    Type: Grant
    Filed: June 28, 2008
    Date of Patent: May 21, 2013
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Dattatray B. Patil, Killol Patel, Ashok Prasad, Mohan Prasad
  • POLYMORPHIC FORMS OF O-DESMETHYL-VENLAFAXINE SUCCINATE
    Publication number: 20120264828
    Abstract: The present invention discloses polymorphic forms of O-desmethyl-venlafaxine succinate and processes for the preparation thereof.
    Type: Application
    Filed: October 4, 2011
    Publication date: October 18, 2012
    Inventors: Shriprakash Dhar DWIVEDI, Ashok Prasad, Rushikesh Udaykumar Roy
  • A PROCESS FOR THE PREPARATION OF DULOXETINE HYDROCHLORIDE
    Publication number: 20120095239
    Abstract: The present invention relates to a process for the preparation of Duloxetine hydrochloride of formula (I).
    Type: Application
    Filed: March 5, 2010
    Publication date: April 19, 2012
    Applicant: ALEMBIC PHARMACEUTICALS LIMITED
    Inventors: Ravi Ponnaiah, Ashok Prasad, Killol Patel, Hitarth Harshendu Acharya
  • PROCESS FOR THE PREPARATION OF 1-BROMO-3,5-DIMETHYL ADAMANTANE
    Publication number: 20110306796
    Abstract: The present invention relates to an improved process for the preparation of 1-bromo-3,5-dimethyl adamantane of formula (III), which is an useful intermediate for synthesis of 1-amino-3,5-dimethyl adamantane of formula (I) or pharmaceutically acceptable salt thereof.
    Type: Application
    Filed: November 30, 2009
    Publication date: December 15, 2011
    Applicant: ALEMBIC LIMITED
    Inventors: Ravi Ponnaiah, Ashok Prasad, Piyush Maheshbhai Rana, Kamlesh Shankarlal Kanzariya, Mitulkumar Bharatkumar Dolia
  • PROCESS FOR THE PREPARATION OF DULOXETINE AND SALTS THEREOF
    Publication number: 20110275836
    Abstract: The present invention relates to improved process for the preparation of Duloxetine of formula (I) and salts thereof wherein said improvement takes place in step of condensation.
    Type: Application
    Filed: December 28, 2009
    Publication date: November 10, 2011
    Applicant: ALEMBIC PHARMACEUTICALS LIMITED
    Inventors: Ravi Ponnaiah, Ashok Prasad, Killol Patel, Hitarth Harshendu Acharya, Vilas Katore, Bhavik Shah
  • PROCESS FOR PREPARING QUETIAPINE FUMARATE-TOLUENE-WATER
    Publication number: 20110230657
    Abstract: The present invention relates to an improved process for preparing Quetiapine fumarate of formula (I).
    Type: Application
    Filed: November 30, 2009
    Publication date: September 22, 2011
    Applicant: ALEMBIC LIMITED
    Inventors: Ravi Ponnaiah, Ashok Prasad, Dineshkumar Ramabhai Panchasara, Mitul Bipinchandra Patwa, Ketan Bharatendubhai Patel
  • PROCESS FOR THE PREPARATION OF DONEPEZIL HYDROCHLORIDE
    Publication number: 20110230663
    Abstract: The present invention relates to novel process for preparing Donepezil hydrochloride of formula (I)
    Type: Application
    Filed: November 30, 2009
    Publication date: September 22, 2011
    Applicant: ALEMBIC LIMITED
    Inventors: Ravi Ponnaiah, Ashok Prasad, Dineshkumar Ramabhai Panchasara, Gajanan Jijaba Chavan, Bhavesh Hareshbhai Prajapati, Ilesh Mahendrabhai Patel
  • PROCESS FOR THE PREPARATION OF INTERMEDIATES OF TETRACYCLIC COMPOUNDS
    Publication number: 20100228030
    Abstract: The present invention relates to a process for the preparation of cis-intermediates of Formula II, (Formula II) wherein R1 represents hydrogen, (un)substituted alkyl, alkenyl, aryl, and X represents a leaving group, which are useful synthetic intermediates in the preparation of tetracyclic compounds having phosphodiesterase inhibitory activity.
    Type: Application
    Filed: June 28, 2008
    Publication date: September 9, 2010
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Dattatray B. Patil, Killol Patel, Ashok Prasad, Mohan Prasad
  • PROCESS FOR THE PREPARATION OF ORLISTAT
    Publication number: 20100179335
    Abstract: The present invention provides a process for preparing orlistat from amino orlistat using Pivaloyl Formic Anhydride (PFA) as an alkanoylating agent.
    Type: Application
    Filed: June 6, 2008
    Publication date: July 15, 2010
    Inventors: Patil Dattatray Bapuso, Killol Patel, Ashok Prasad, Keshav Deo, Mohan Prasad
  • Process for the preparation of cefdinir
    Publication number: 20060040915
    Abstract: The present invention relates to a process for the preparation of cefdinir on an industrial scale.
    Type: Application
    Filed: April 26, 2002
    Publication date: February 23, 2006
    Inventors: Yatendra Kumar, Mohan Prasad, Ashok Prasad, Shailendra Singh, Neela Kumar
  • Crystalline cefdinir potassium dihydrate
    Publication number: 20050080255
    Abstract: The present invention relates to a novel crystalline cefdinir potassium dihydrate, to a process for its preparation and to a method of preparing pure cefdinir via the crystalline salt.
    Type: Application
    Filed: December 12, 2002
    Publication date: April 14, 2005
    Inventors: Yatendra Kumar, Mohan Prasad, Ashok Prasad, Shailendra Singh, Neela Kumar