Patents by Inventor Lajos Imrei

Lajos Imrei 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 substituted isoflavone derivative
    Patent number: 5247102
    Abstract: The invention relates to a process for the preparation of pure isoflavone derivatives of the general formula (I), ##STR1## wherein R stands for hydrogen or isopropyl,R.sup.2 and R.sup.3 stand for hydrogen or C.sub.1-2 alkoxy by reacting a rezorcinol-derivative of the general formula (III) ##STR2## wherein R.sup.2 and R.sup.3 are as given above with ethyl-orthoformiate of the formula (IV)(C.sub.2 H.sub.5 O).sub.3l CH (IV)in the presence of a base and optionally by alkylating the product.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: September 21, 1993
    Assignee: Chinoin Gyogyszer- es Vegyeszeti Termekek Gyara Rt.
    Inventors: Tamas Kallay, Gyorgy Lanyi, Laszlo Ledniczky, Lajos Imrei, Gyorgy Hoffmann, Maria Sziladi, Eva Somfai, Tibor Montay
  • 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