Patents by Inventor Iren Borsos nee Spafranek

Iren Borsos nee Spafranek 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 chromene derivatives
    Patent number: 4968819
    Abstract: The invention relates to a process for the preparation of Chromenes of the general Formula V ##STR1## prepared from chromanone derivatives.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: November 6, 1990
    Assignee: Alkaloida Vegyeszeti Gyar
    Inventors: Tibor Timar, Kalman Zsupan, Janos Repasi, Iren Borsos nee Spafranek, Istvan Kiss, Andras Fodor, Peter Maroy