Patents by Inventor Ferenc Vezekenyi

Ferenc Vezekenyi 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).

  • 1.alpha.-Ethyl-1.beta.-(2'-alkoxy carbonyl-2'-hydroxyiminoethyl)-10-methoxy 1,2,3,4,6,7,12,12.beta.-octahydroindolo(2,3A)quinolizines
    Patent number: 4429129
    Abstract: The invention relates to a new process for the preparation of alkoxyvincaminic acid esters of the formula (I) ##STR1## and/or alkoxyapovincaminic acid esters of the formula (II) ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 independently stand for alkyl groups having from one to 6 carbon atoms.The compounds of the formulae (I) and (II) are pharmaceutically active, thus some of them show psychostimulant activity.
    Type: Grant
    Filed: August 20, 1982
    Date of Patent: January 31, 1984
    Assignee: Richter Gedeon Vegyeszeti Gyar Rt
    Inventors: Csaba Szantay, Lajos Szabo, Gyorgy Kalaus, Tibor Keve, Lajos Dancsi, Janos Galambos, Ferenc Vezekenyi, Tibor Acs