Patents by Inventor Zoltan Czovek

Zoltan Czovek 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 mycophenolic acid and ester derivatives thereof
    Patent number: 7683188
    Abstract: Provided are processes for preparation of mycophenolic acid.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: March 23, 2010
    Assignee: TEVA Gyógyszergyár Zártkōrūen Mūkōdō Részvénytársaság
    Inventors: Vilmos Keri, Zoltan Czovek
  • Process for preparation of mycophenolic acid and ester derivatives thereof
    Publication number: 20090240069
    Abstract: Provided are processes for preparation of mycophenolic acid.
    Type: Application
    Filed: April 1, 2009
    Publication date: September 24, 2009
    Inventors: Vilmos Keri, Zoltan Czovek
  • Method of purifying macrolides
    Publication number: 20070117976
    Abstract: Provided is a method of purifying a macrolide, especially tacrolimus, that includes loading macrolide onto a bed of sorption resin and eluting with a suitable eluent such as a combination of water and tetrahydrofuran.
    Type: Application
    Filed: January 17, 2007
    Publication date: May 24, 2007
    Inventors: Vilmos Keri, Zoltan Czovek, Andrea Csorvasi, Ferenc Rantal
  • Method of purifying macrolides
    Patent number: 7220357
    Abstract: Provided is a method of purifying a macrolide, especially tacrolimus, that includes loading macrolide onto a bed of sorption resin and elting with a suitable eluent such as a combination of water and tetrahydrofuran.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: May 22, 2007
    Assignee: Teva Gyógyszergyár Zártkörúen Múkó´dó´Résvénytársaság
    Inventors: Vilmos Keri, Zoltan Czövek, Andrea Csorvasi, Ferenc Rantal
  • Methods of making pravastatin sodium
    Publication number: 20060194984
    Abstract: The invention encompasses a new crystalline form of pravastatin sodium characterized by X-ray powder diffraction peaks at 3.3, 3.9, 5.4, 6.4, 16.8, and 17.5 degrees two-theta, ±0.1 degrees two-theta and to methods of forming the crystalline form of the present invention and methods of making pravastatin Form B and Form D.
    Type: Application
    Filed: February 9, 2006
    Publication date: August 31, 2006
    Inventors: Vilmos Keri, Edit Nagyne Arvai, Zoltan Czovek, Adrienne Kovacsne-Mezei, Istvan Katai, Csilla Nemethne Racz
  • Method of purifying macrolides
    Publication number: 20060149057
    Abstract: A method for purifying macrolide is provided in which a loading charge of macrolide is placed in juxtaposition with a bed of wet sorption resin, the loading charge and bed are eluted at a temperature greater than 30° C. with an eluent of an organic solvent selected from the group consisting of THF, acetonitrile, n-propyl alcohol, iso-propyl alcohol, ethyl alcohol, and acetone, the heart cut of the eluent is collected, and purified macrolide is collected.
    Type: Application
    Filed: December 22, 2005
    Publication date: July 6, 2006
    Inventors: Vilmos Keri, Zoltan Czovek
  • Process for preparation of mycophenolic acid and ester derivatives thereof
    Publication number: 20050250952
    Abstract: Provided are processes for preparation of mycophenolic acid.
    Type: Application
    Filed: April 26, 2005
    Publication date: November 10, 2005
    Inventors: Vilmos Keri, Zoltan Czovek
  • Multistage process for the preparation of highly pure deferoxamine mesylate salt
    Patent number: 6858414
    Abstract: The present invention provides a purification process whereby deferoxamine B produced by a microorganism and in mixture with other polyhydroxamates produced by the microorganism may be converted into its mesylate salt substantially free of the other polyhydroxamates and substantially free of chloride ion. The process includes adsorption and desorption of the deferoxamine B on an adsorption resin, direct precipitation of the deferoxamine free base out of the eluent from the adsorption resin, contacting of the deferoxamine B free base with methanesulfonic acid and isolation of the deferoxamine B mesylate salt by precipitation. This process minimizes decomposition of deferoxamine B.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: February 22, 2005
    Assignee: Biogal Gyógyszergyár Rt.
    Inventors: Vilmos Keri, Zoltan Czovek, Attila Mezo
  • Method of purifying macrolides
    Publication number: 20050027112
    Abstract: Provided is a method of purifying a macrolide, especially tacrolimus, that includes loading macrolide onto a bed of sorption resin and elting with a suitable eluent such as a combination of water and tetrahydrofuran.
    Type: Application
    Filed: July 26, 2004
    Publication date: February 3, 2005
    Inventors: Vilmos Keri, Zoltan Czovek, Andrea Csorvasi, Ferenc Rantal
  • Multistage process for the preparation of highly pure deferoxamine mesylate salt
    Publication number: 20030059905
    Abstract: The present invention provides a purification process whereby deferoxamine B produced by a microorganism and in mixture with other polyhydroxamates produced by the microorganism may be converted into its mesylate salt substantially free of the other polyhydroxamates and substantially free of chloride ion. The process includes adsorption and desorption of the deferoxamine B on an adsorption resin, direct precipitation of the deferoxamine free base out of the eluent from the adsorption resin, contacting of the deferoxamine B free base with methanesulfonic acid and isolation of the deferoxamine B mesylate salt by precipitation. This process minimizes decomposition of deferoxamine B.
    Type: Application
    Filed: June 18, 2002
    Publication date: March 27, 2003
    Inventors: Vilmos Keri, Zoltan Czovek, Attila Mezo