Patents by Inventor Laszlo rvai

Laszlo rvai 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 ketone compounds
    Patent number: 5235109
    Abstract: The invention relates to an improved, large scale process for the preparation of compounds of formula (I) ##STR1## wherein R is halogen atom or hydroxyl,R.sup.2 is hydrogen atom or hydroxyl,R.sup.3 and R.sup.4 are hydrogen or alkoxy having 1-6 carbon atoms.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: August 10, 1993
    Assignee: Chinoin Gyogyszer- Es Vegyeszeti Termekek Gyara RT
    Inventors: Gyorgy Lanyi, Tamas Kallay, Laszlo Ledniczky, Lajos Imrei, Eva Somfai, Tibor Montay, Robert Gepesz, Valeria Denes nee Lustig, Laszlo rvai