Patents by Inventor Pritesh R. Upadhyay

Pritesh R. Upadhyay 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).

  • Stable amorphous form of carvedilol dihydrogen phosphate with stabilizer
    Patent number: 8278461
    Abstract: The present invention provides a novel stable amorphous form of carvedilol dihydrogen phosphate and the process for its preparation that involves reaction of carvedilol base with ortho phosphoric acid in the presence of stabilizer in a suitable solvent or mixture of solvents followed by concentration and isolation. An alternate process for preparation of amorphous form of carvedilol dihydrogen phosphate involves addition of stabiliser to the solution of stable amorphous or crystalline carvedilol dihydrogen phosphate in a suitable solvent or mixture of solvents followed by concentration and isolation. The novel stable amorphous form of carvedilol dihydrogen phosphate is highly stable.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: October 2, 2012
    Assignee: Lupin Limited
    Inventors: Rajesh Kumar Thaper, Manoj Devilalji Prabhavat, Yogesh Dadaji Pawar, Pritesh R. Upadhyay
  • STABLE AMORPHOUS FORM OF CARVEDILOL DIHYDROGEN PHOSPHATE WITH STABILIZER
    Publication number: 20110124879
    Abstract: The present invention provides a novel stable amorphous form of carvedilol dihydrogen phosphate and the process for its preparation that involves reaction of carvedilol base with ortho phosphoric acid in the presence of stabilizer in a suitable solvent or mixture of solvents followed by concentration and isolation. An alternate process for preparation of amorphous form of carvedilol dihydrogen phosphate involves addition of stabiliser to the solution of stable amorphous or crystalline carvedilol dihydrogen phosphate in a suitable solvent or mixture of solvents followed by concentration and isolation. The novel stable amorphous form of carvedilol dihydrogen phosphate is highly stable.
    Type: Application
    Filed: August 6, 2008
    Publication date: May 26, 2011
    Applicant: Lupin Limited
    Inventors: Rajesh Kumar Thaper, Manoj Devilalji Prabhavat, Yogesh Dadaji Pawar, Pritesh R. Upadhyay