Patents by Inventor Arvai Edit Nagyne

Arvai Edit Nagyne 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).

  • Pravastatin sodium substantially free of pravastatin lactone and epi-pravastatin, and compositions containing same
    Patent number: 6936731
    Abstract: The present invention provides pravastatin sodium substantially free of pravastatin lactone and epiprava, the C-6 epimer of pravastatin. The present invention further provides a novel process for recovering pravastatin sodium from a fermentation broth in such high purity. The process includes the stages of forming an solution of the compound by extraction, obtaining an ammonium salt of pravastatin from the solution, purifying the ammonium salt of the compound and transposing the salt of the compound to pravastatin sodium.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: August 30, 2005
    Assignee: TEVA Gyógyszergyár Részvénytársaság
    Inventors: Vilmos Keri, Lajos Deak, Ilona Forgacs, Csaba Szabo, Arvai Edit Nagyne
  • Purification process
    Publication number: 20020162789
    Abstract: Object of the invention is a process for the chromatographic purification of cyclosporin A from a crude product containing cyclosporin complex by using a column filled with silica gel and by the application of multistep chromatography with a column filled with normal phase silica gel and by a solvent mixture containing toluene as the major component.
    Type: Application
    Filed: May 15, 2002
    Publication date: November 7, 2002
    Inventors: Vilmos Keri, Arvai Edit Nagyne, Lajos Deak, Gyorgyne Mako, Istvanne Miskolczy
  • Purification process
    Patent number: 6423233
    Abstract: Object of the invention is a process for the chromatographic purification of cyclosporin A from a crude product containing cyclosporin complex by using a column filled with silica gel and by the application of multistep chromatography with a column filled with normal phase silica gel and by a solvent mixture containing toluene as the major component.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: July 23, 2002
    Assignee: Biogal Gyogyszergyar Rt.
    Inventors: Vilmos Kéri, Árvai Edit Nagyné, Lajos Deák, Györgyné Makó, Istvánné Miskolczy
  • Pravastatin sodium substantially free of pravastatin lactone and epi-pravastatin, and compositions containing same
    Publication number: 20020082295
    Abstract: The present invention provides pravastatin sodium substantially free of pravastatin lactone and epiprava, the C-6 epimer of pravastatin. The present invention further provides a novel process for recovering pravastatin sodium from a fermentation broth in such high purity. The process includes the stages of forming an solution of the compound by extraction, obtaining an ammonium salt of pravastatin from the solution, purifying the ammonium salt of the compound and transposing the salt of the compound to pravastatin sodium.
    Type: Application
    Filed: October 5, 2001
    Publication date: June 27, 2002
    Inventors: Vilmos Keri, Lajos Deak, Ilona Forgacs, Csaba Szabo, Arvai Edit Nagyne