Patents by Inventor Sampath Alla

Sampath Alla 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 preparation of celecoxib
    Patent number: 7919633
    Abstract: There is provided a process for preparation of celecoxib by reacting 4,4,4-trifluoro-1-[4-(methyl)phenyl]butane-1,3-dione with 4-sulphonamidophenylhydrazine or its salt in a solvent medium that contains an alkyl ester. There is also provided a process for the purification of celecoxib using aromatic hydrocarbon solvents.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: April 5, 2011
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Raghupathi Reddy Anumula, Goverdhan Gilla, Sampath Alla, Thirupathi Reddy Akki, Yakambram Bojja
  • PROCESSES FOR PREPARING ZAFIRLUKAST
    Publication number: 20090149662
    Abstract: An improved process for the preparation of substantially pure zafirlukast and pharmaceutical compositions thereof.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 11, 2009
    Inventors: Raghupathi Reddy Anumula, Goverdhan Gilla, Sampath Alla, Sreenivasulu Kurella, Janardana Sarma Ramachandra Kopparapu, Rama Krishna Venkata Medisetti, Srinivasula Reddy Maddula
  • PROCESS FOR PREPARATION OF CELECOXIB
    Publication number: 20080234491
    Abstract: There is provided a process for preparation of celecoxib by reacting 4,4,4-trifluoro-1-[4-(methyl)phenyl]butane-1,3-dione with 4-sulphonamidophenylhydrazine or its salt in a solvent medium that contains an alkyl ester. There is also provided a process for the purification of celecoxib using aromatic hydrocarbon solvents.
    Type: Application
    Filed: March 19, 2008
    Publication date: September 25, 2008
    Inventors: Raghupathi Reddy Anumula, Goverdhan Gilla, Sampath Alla, Thirupathi Reddy Akki, Yakambram Bojja
  • PREPARATION OF ALFUZOSIN
    Publication number: 20070066824
    Abstract: A process for preparing alfuzosin or a salt thereof, which minimizes the concentration of an N1-(4-amino-6,7-dimethoxyquinazolin-2-yl)-N1-methyl-N 2-(4-amino-6,7-dimethoxyquinazolin-2-yl)-propane-1,3-diamine impurity in the product.
    Type: Application
    Filed: September 22, 2006
    Publication date: March 22, 2007
    Inventors: Raghupathi Anumula, Sampath Alla, Goverdhan Gilla, Yakambram Bojja
  • ALFUZOSIN HYDROCHLORIDE POLYMORPHS
    Publication number: 20070049756
    Abstract: Alfuzosin hydrochloride crystalline and amorphous polymorphic forms and processes for preparing them.
    Type: Application
    Filed: August 29, 2006
    Publication date: March 1, 2007
    Inventors: Raghupathi Anumula, Sampath Alla, Lokeswara Madivada, Goverdhan Gilla