Patents by Inventor Janos Kreidl, deceased

Janos Kreidl, deceased 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 preparing monohydrate and crystal modifications of fluconazole
    Patent number: 7094904
    Abstract: A new process is disclosed for the synthesis of fluconazole monohydrate and for crystal modifications of fluconazole which comprises the step of hydrolyzing a silyl ether of the formula (II) ?wherein R2 is hydrogen, or a C1 to C10 alkyl or phenyl group, R3 and R4 independently of each other are a C1 to C10 alkyl or phenyl group in an aqueous solution, preferably at a pH below 3 or above 8.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: August 22, 2006
    Assignee: Richter Gedeon Vegyeszeti Gyar Rt.
    Inventors: Jánosné´ Kreidl née Regina Hegedus, legal representative, Laszlo Czibula, Csaba Szantay, Jenone Farkas, Ida Deutschne Juhasz, Istvan Hegedus, Eva Werkne Papp, Judit Nagyne Bagdy, Agnes Piller, Janos Kreidl, deceased