Patents by Inventor Killol Patel

Killol Patel 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 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
  • 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
  • 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 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 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 ORLISTAT
    Publication number: 20090171104
    Abstract: The present invention provides a process for preparing orlistat (I) by alkanoylating an amino orlistat using formic acid anhydride as an alkanoylating agent to obtain orlistat substantially free of the byproduct, (S)-N-acetylleucine (1S)-1-[[(2S, 3S)-3-hexyl-4-oxo-2-oxetanyl]methyl] dodecyl ester (deformyl-N-acetyl orlistat).
    Type: Application
    Filed: May 10, 2006
    Publication date: July 2, 2009
    Inventors: Killol Patel, Seema Kanwar, Keshav Deo, Mohan Prasad
  • PROCESS FOR THE PREPARATION OF PRAMIPEXOLE AND NEW ANHYDROUS FORMS OF ITS DIHYDROCHLORIDE
    Publication number: 20090062549
    Abstract: The present invention provides processes for the preparation of (?) pramipexole or an acid addition salt thereof of Formula I. The present invention further provides for the novel polymorphic Forms A and B of anhydrous pramipexole dihydrochloride.
    Type: Application
    Filed: April 26, 2006
    Publication date: March 5, 2009
    Inventors: Seema Kanwar, Killol Patel, Keshav Deo, Mohan Prasad