Patents by Inventor Dattatray B. Patil

Dattatray B. Patil 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
    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 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
  • 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