Patents by Inventor Peter Dvortsak

Peter Dvortsak 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).

  • Pentahalophenyl ester of cyanoacetic acid derivatives
    Patent number: 4508658
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is hydrogen or C.sub.1 to C.sub.6 alkyl;R.sup.2 is hydrogen, phenyl, thienyl, furyl, pyridyl, C.sub.1 to C.sub.6 alkyl, furylalkyl where the alkyl is C.sub.1 to C.sub.6, or phenylalkyl where the alkyl is C.sub.1 to C.sub.6 ; orR.sup.1 and R.sup.2 together form C.sub.1 to C.sub.4 alkylene, furyl-C.sub.1 to C.sub.4 alkylene or phenyl-C.sub.1 to C.sub.4 alkylene; and X is halo; ora pharmaceutically acceptable salt thereof, are disclosed as well as a process for the preparation thereof. The new compounds are intermediates useful in the production of penicillins and cephalosporins with antibiotic activity.
    Type: Grant
    Filed: January 18, 1980
    Date of Patent: April 2, 1985
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt.
    Inventors: Magda Huhn, Gabor Szabo, Peter Dvortsak, Marianna Karpati, Eva Somfai
  • Heterocyclic-amino-acrylic acid derivatives
    Patent number: 4089858
    Abstract: The present invention is concerned with the preparation of chemical intermediates, namely, beta-amino-acrylic acid ester derivatives of nitrogen heterocycles, i.e. pyridine, quinoline, quinoxaline, pyrazine, pyrimidine and the like. Said intermediates are cyclized to form pyrido-pyrimidine type final products possessing analgesic activity.
    Type: Grant
    Filed: September 17, 1975
    Date of Patent: May 16, 1978
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt.
    Inventors: Zoltan Meszaros, Jozsef Knoll, Istvan Hermecz, Piroska Simon, Peter Szentmiklosy, Lelle Vasvari, Agnes Horvath, Gabor Horvath, Peter Dvortsak