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).

  • Amorphous form of linagliptin and process for preparation thereof
    Patent number: 9879011
    Abstract: The present invention relates to an amorphous form of linagliptin and processes for the preparation thereof. The invention also relates to a pharmaceutical composition comprising a therapeutically effective amount of an amorphous form of linagliptin and use of the composition for treatment of diabetes especially type-I or type-II, prediabetes or reduction of glucose tolerance.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: January 30, 2018
    Assignee: Cadila Healthcare Limited
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Kuldeep Natwarlal Jain, Kumar Kamlesh Singh, Jitendra Maganbhai Gajera
  • Polymorphic forms of ivabradine hydrochloride
    Patent number: 9840469
    Abstract: Stable crystalline Form II and stable crystalline Form III of ivabradine hydrochloride and processes for their preparation are disclosed.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: December 12, 2017
    Assignee: Cadila Healthcare Limited
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Mukul Hariprasad Sharma, Piyush Rajendra Sharma, Jayprakash Ajitsingh Parihar
  • POLYMORPHIC FORMS OF IVABRADINE HYDROCHLORIDE
    Publication number: 20170217898
    Abstract: Stable crystalline Form II and stable crystalline Form III of ivabradine hydrochloride and processes for their preparation are disclosed.
    Type: Application
    Filed: April 12, 2017
    Publication date: August 3, 2017
    Inventors: Shriprakash Dhar DWIVEDI, Ashok PRASAD, Mukul Hariprasad SHARMA, Piyush Rajendra SHARMA, Jayprakash Ajitsingh PARIHAR
  • Polymorphic forms of ivabradine hydrochloride
    Patent number: 9650344
    Abstract: Stable crystalline Form II and stable crystalline Form III of ivabradine hydrochloride and processes for their preparation are disclosed.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: May 16, 2017
    Assignee: CADILA HEALTHCARE LIMITED
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Mukul Hariprasad Sharma, Piyush Rajendra Sharma, Jayprakash Ajitsingh Parihar
  • POLYMORPHIC FORMS OF IVABRADINE HYDROCHLORIDE
    Publication number: 20160318873
    Abstract: Stable crystalline Form II and stable crystalline Form III of ivabradine hydrochloride and processes for their preparation are disclosed.
    Type: Application
    Filed: May 31, 2016
    Publication date: November 3, 2016
    Inventors: Shriprakash Dhar DWIVEDI, Ashok PRASAD, Mukul Hariprasad SHARMA, Piyush Rajendra SHARMA, Jayprakash Ajitsingh PARIHAR
  • Polymorphic forms of ivabradine hydrochloride
    Patent number: 9382209
    Abstract: Stable crystalline Form II and stable crystalline Form III of ivabradine hydrochloride and processes for their preparation are disclosed.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: July 5, 2016
    Assignee: Cadila Healthcare Limited
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Mukul Hariprasad Sharma, Piyush Rajendra Sharma, Jayprakash Ajitsingh Parihar
  • POLYMORPHIC FORMS OF IVABRADINE HYDROCHLORIDE
    Publication number: 20160024015
    Abstract: Stable crystalline Form II and stable crystalline Form III of ivabradine hydrochloride and processes for their preparation are disclosed.
    Type: Application
    Filed: August 4, 2015
    Publication date: January 28, 2016
    Inventors: Shriprakash Dhar DWIVEDI, Ashok Prasad, Mukul Hariprasad Sharma, Piyush Rajendra Sharma, Jayprakash Ajitsingh Parihar
  • Polymorphic forms of ivabradine hydrochloride
    Patent number: 9120755
    Abstract: Stable crystalline Form II and stable crystalline Form III of ivabradine hydrochloride and processes for their preparation are disclosed.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: September 1, 2015
    Assignee: Cadila Healthcare Limited
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Mukul Hariprasad Sharma, Piyush Rajendra Sharma, Jaiprakash Ajitsingh Parihar
  • Processes for the preparation of fesoterodine
    Patent number: 9012678
    Abstract: The invention relates to improved process for the preparation of fesoterodine and its pharmaceutically acceptable salt, specifically fesoterodine fumarate of formula (1). The invention relates to solid state forms of a novel salt of fesoterodine and process for the preparation thereof. The invention also relates to highly pure fesoterodine fumarate substantially free of impurity X at RRT 1.37. The invention also provides solid particles of pure fesoterodine fumarate wherein 90 volume-percent of the particles (D90) have a size of higher than 200 microns.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: April 21, 2015
    Assignee: Cadila Healthcare Limited
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Kuldeep Natwarlal Jain
  • One-pot process for the preparation of benzimidazole derivatives
    Patent number: 8962851
    Abstract: The present invention discloses one pot process for enantioselective synthesis of single enantiomers of substituted sulphoxides 2-(2-pyridinylmethylsulphinyl)-1H-benzimidazoles or said compounds in an enantiomerically enriched form.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: February 24, 2015
    Assignee: Cadila Healthcare Limited
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Daya Ram Pal
  • AMORPHOUS FORM OF LINAGLIPTIN AND PROCESS FOR PREPARATION THEREOF
    Publication number: 20150051228
    Abstract: The present invention relates to an amorphous form of linagliptin and processes for the preparation thereof. The invention also relates to a pharmaceutical composition comprising therapeutically effective amount of an amorphous form of linagliptin and use of said composition for treatment of diabetes especially type-I or type-II, prediabetes or reduction of glucose tolerance.
    Type: Application
    Filed: March 12, 2013
    Publication date: February 19, 2015
    Applicant: CADILA HEALTHCARE LIMITED
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Kuldeep Natwarlal Jain, Kumar Kamlesh Singh, Jitendra Maganbhai Gajera
  • Polymorphic forms of O-desmethyl-venlafaxine succinate
    Patent number: 8933123
    Abstract: The present invention discloses polymorphic forms of O-desmethyl-venlafaxine succinate and processes for the preparation thereof.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: January 13, 2015
    Assignee: Cadila Healthcare Limited
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Rushikesh Udaykumar Roy
  • PROCESSES AND INTERMEDIATES FOR PREPARING RIVAROXABAN
    Publication number: 20140378682
    Abstract: The invention discloses processes for the preparation of rivaroxaban and its pharmaceutically acceptable salts, solvates, and hydrates thereof. The invention also relates to novel intermediates for the preparation of rivaroxaban.
    Type: Application
    Filed: September 10, 2012
    Publication date: December 25, 2014
    Applicant: CADILA HEALTHCARE LIMITED
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Daya Ram Pal, Mukul Hari Prasad Sharma, Kuldeep Natwarlal Jain, Naitik Bharatbhai Patel
  • POLYMORPHIC FORMS OF IVABRADINE HYDROCHLORIDE
    Publication number: 20140323471
    Abstract: Stable crystalline Form II and stable crystalline Form III of ivabradine hydrochloride and processes for their preparation are disclosed.
    Type: Application
    Filed: November 12, 2012
    Publication date: October 30, 2014
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Mukul Hariprasad Sharma, Piyush Rajendra Sharma, Jaiprakash Ajitsingh Parihar
  • Process for the preparation of tadalafil
    Patent number: 8871932
    Abstract: The present invention relates to a process for the preparation of tadalafil of Formula I, comprising reacting a D-tryptophan compound of Formula III with piperonal in sulfolane.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: October 28, 2014
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Dattatray Bapuso Patil, Killol Patel, Ashok Prasad, Mohan Prasad
  • PROCESS FOR THE PREPARATION OF AN INTERMEDIATE OF TADALAFIL
    Publication number: 20140142309
    Abstract: The present invention relates to a process for the preparation of a cis-intermediate compound of Formula II which is a useful synthetic intermediate for the preparation of tadalafil of Formula I—a potent, selective, and reversible inhibitor of cyclic guanosine 3?,5?-monophosphate specific phosphodiesterase type 5 enzyme having phosphodiesterase inhibitory activity.
    Type: Application
    Filed: April 10, 2013
    Publication date: May 22, 2014
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Dattatray B. PATIL, Killol Patel, Ashok Prasad, Mohan Prasad
  • Process for the preparation of orlistat
    Patent number: 8680298
    Abstract: The present invention provides a process for preparing orlistat from amino orlistat using Pivaloyl Formic Anhydride (PFA) as an alkanoylating agent.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: March 25, 2014
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Patil Dattatray Bapuso, Killol Patel, Ashok Prasad, Keshav Deo, Mohan Prasad
  • PROCESSES FOR THE PREPARATION OF FESOTERODINE
    Publication number: 20130197260
    Abstract: The invention relates to improved process for the preparation of fesoterodine and its pharmaceutically acceptable salt, specifically fesoterodine fumarate of formula (1). The invention relates to solid state forms of a novel salt of fesoterodine and process for the preparation thereof. The invention also relates to highly pure fesoterodine fumarate substantially free of impurity X at RRT 1.37. The invention also provides solid particles of pure fesoterodine fumarate wherein 90 volume-percent of the particles (D90) have a size of higher than 200 microns.
    Type: Application
    Filed: August 25, 2011
    Publication date: August 1, 2013
    Applicant: CADILA HEALTHCARE LIMITED
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Kuldeep Natwarlal Jain
  • SUBSTANTIALLY PURE SALTS OF FEBUXOSTAT AND PROCESSES FOR PREPARATION THEREOF
    Publication number: 20130190366
    Abstract: Substantially pure salts of febuxostat of Formula (IA): wherein Y is Na+, K+, Li+, Mg2+, Ca2+, Zn2+, Ba2+, Sr2+, choline, epolamine and N+(R)4 and processes for preparation thereof are disclosed.
    Type: Application
    Filed: February 18, 2011
    Publication date: July 25, 2013
    Applicant: CADILA HEALTHCARE LIMITED
    Inventors: Shriprakash Dhar Dwivedi, Ashok Prasad, Rushikesh Udaykumar Roy, Mayur Ramnikbhai Patel
  • 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