Patents by Inventor Mahavir Singh Khanna

Mahavir Singh Khanna 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).

  • Barium salt of benzimidazole derivative
    Patent number: 8404854
    Abstract: The invention relates to crystalline barium salt of (S)-omeprazole, which is (S)-5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole. The invention also relates to processes for preparing crystalline barium salt of (S)-omeprazole and pharmaceutical compositions that include the crystalline barium salt of (S)-omeprazole so prepared.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: March 26, 2013
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Yatendra Kumar, Mahavir Singh Khanna, Mohan Prasad
  • CRYSTALLINE FORMS OF BOSENTAN SALTS AND PROCESSES FOR THEIR PREPARATION
    Publication number: 20120283440
    Abstract: The present invention relates to crystalline forms of bosentan salts and processes for their preparation.
    Type: Application
    Filed: November 12, 2010
    Publication date: November 8, 2012
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Rakesh Singh, Anu Mittal, Gopal Singh Bisht, Mahavir Singh Khanna, Rajesh Kumar Thaper, Mohan Prasad
  • PROCESSES FOR THE PREPARATION OF VARDENAFIL
    Publication number: 20120190849
    Abstract: The present invention provides processes for the preparation of vardenafil, its pharmaceutically acceptable salts, hydrates and intermediates.
    Type: Application
    Filed: August 9, 2010
    Publication date: July 26, 2012
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Anu Mittal, Mahavir Singh Khanna, Rajesh Kumar Thaper, Mohan Prasad
  • PROCESS FOR THE PREPARATION OF 3,4-EPOXY-2-AMINO-1-SUBSTITUTED BUTANE DERIVATIVES AND INTERMEDIATE COMPOUNDS THEREOF
    Publication number: 20110178305
    Abstract: The present invention relates to a process for the preparation of threo-3,4-epoxy-2-amino-1-substituted butane derivatives represented by general Formula I which comprises reacting compound of Formula III or salt thereof with an active ester of acid of Formula IV and treating the product thereof with base. The carbon atom bonded to the radical R3 in Formula I and IV is in the (R)-, (S)- or (R,S)-configuration. The compounds of Formula I and III, particularly in their (2S,3R) configuration are useful intermediates for the preparation of atazanavir bisulfate.
    Type: Application
    Filed: May 5, 2009
    Publication date: July 21, 2011
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Rakesh Singh, Prasad Yeragorla, Mahavir Singh Khanna, Mohan Prasad
  • BARIUM SALT OF BENZIMIDAZOLE DERIVATIVE
    Publication number: 20110086884
    Abstract: The invention relates to crystalline barium salt of (S)-omeprazole, which is (S)-5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole. The invention also relates to processes for preparing crystalline barium salt of (S)-omeprazole and pharmaceutical compositions that include the crystalline barium salt of (S)-omeprazole so prepared.
    Type: Application
    Filed: December 20, 2010
    Publication date: April 14, 2011
    Inventors: Yatendra KUMAR, Mahavir Singh Khanna, Mohan Prasad
  • Processes for the preparation of substituted sulfoxides
    Patent number: 7915422
    Abstract: The present invention relates to a process for enantioselective synthesis of substituted pyridinylmethyl sulfinyl-benzimidazole of compound of Formula (I). The process includes enantioselective catalytic oxidation of a substituted pyridinylmethyl prochiral sulfide derivative of compound of Formula (II) with an oxidizing agent in the presence of a chiral transition metal complex and a base in the absence of an organic solvent.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: March 29, 2011
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Neela Praveen Kumar, Mahavir Singh Khanna, Mohan Prasad, Yatendra Kumar
  • Barium salt of benzimidazole derivative
    Patent number: 7872140
    Abstract: The invention relates to crystalline barium salt of (S)-omeprazole, which is (S)-5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole. The invention also relates to processes for preparing crystalline barium salt of (S)-omeprazole and pharmaceutical compositions that include the crystalline barium salt of (S)-omeprazole so prepared.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: January 18, 2011
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Yatendra Kumar, Mahavir Singh Khanna, Mohan Prasad
  • BARIUM SALT OF BENZIMIDAZOLE DERIVATIVE
    Publication number: 20100145058
    Abstract: The invention relates to crystalline barium salt of (S)-omeprazole, which is (S)-5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole. The invention also relates to processes for preparing crystalline barium salt of (S)-omeprazole and pharmaceutical compositions that include the crystalline barium salt of (S)-omeprazole so prepared.
    Type: Application
    Filed: February 9, 2010
    Publication date: June 10, 2010
    Inventors: Yatendra KUMAR, Mahavir Singh Khanna, Mohan Prasad
  • BARIUM SALT OF BENZIMIDAZOLE DERIVATIVE
    Publication number: 20100137607
    Abstract: The invention relates to crystalline barium salt of (S)-omeprazole, which is (S)-5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole. The invention also relates to processes for preparing crystalline barium salt of (S)-omeprazole and pharmaceutical compositions that include the crystalline barium salt of (S)-omeprazole so prepared.
    Type: Application
    Filed: February 9, 2010
    Publication date: June 3, 2010
    Inventors: Yatendra KUMAR, Mahavir Singh Khanna, Mohan Prasad
  • BARIUM SALT OF BENZIMIDAZOLE DERIVATIVE
    Publication number: 20090259047
    Abstract: The invention relates to crystalline barium salt of (S)-omeprazole, which is (S)-5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole. The invention also relates to processes for preparing crystalline barium salt of (S)-omeprazole and pharmaceutical compositions that include the crystalline barium salt of (S)-omeprazole so prepared.
    Type: Application
    Filed: May 15, 2009
    Publication date: October 15, 2009
    Inventors: Yatendra KUMAR, Mahavir Singh Khanna, Mohan Prasad
  • Amorphous form of esomeprazole salts
    Patent number: 7482463
    Abstract: The invention relates to an amorphous form of the salts of the (-) enantiomer or (S)-enantiomer of omeprazole, i.e., esomeprazole. The invention also relates to processes for preparing amorphous esomeprazole salts and pharmaceutical compositions that include the amorphous esomeprazole salts.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: January 27, 2009
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Mahavir Singh Khanna, Bakthavathsalan Vijayaraghavan, Mohan Prasad, Yatendra Kumar
  • Processes for the Preparation of Substituted Sulfoxides
    Publication number: 20080275245
    Abstract: The present invention relates to a process for enantioselective synthesis of substituted pyridinylmethyl sulfinyl-benzimidazole of compound of Formula (I). The process includes enantioselective catalytic oxidation of a substituted pyridinylmethyl prochiral sulfide derivative of compound of Formula (II) with an oxidizing agent in the presence of a chiral transition metal complex and a base in the absence of an organic solvent.
    Type: Application
    Filed: October 4, 2005
    Publication date: November 6, 2008
    Inventors: Neela Praveen Kumar, Mahavir Singh Khanna, Mohan Prasad, Yatendra Kumar
  • AMORPHOUS FORM OF ESOMEPRAZOLE SALTS
    Publication number: 20080119654
    Abstract: The invention relates to an amorphous form of the salts of the (-) enantiomer or (S)-enantiomer of omeprazole, i.e., esomeprazole. The invention also relates to processes for preparing amorphous esomeprazole salts and pharmaceutical compositions that include the amorphous esomeprazole salts.
    Type: Application
    Filed: November 28, 2007
    Publication date: May 22, 2008
    Inventors: Mahavir Singh KHANNA, Bakthavathsalan Vijayaraghavan, Mohan Prasad, Yatendra Kumar
  • Amorphous form of esomeprazole salts
    Publication number: 20040235903
    Abstract: The invention relates to an amorphous form of the salts of the (−) enantiomer or (S)-enantiomer of omeprazole, i.e., esomeprazole. The invention also relates to processes for preparing amorphous esomeprazole salts and pharmaceutical compositions that include the amorphous esomeprazole salts.
    Type: Application
    Filed: October 22, 2003
    Publication date: November 25, 2004
    Inventors: Mahavir Singh Khanna, Bakthavathsalan Vijayaraghavan, Mohan Prasad, Yatendra Kumar