Patents by Inventor Laszlo Kaufer

Laszlo Kaufer 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).

  • 3(2H)-pyridazinones and pharmaceutical compositions thereof
    Patent number: 4826845
    Abstract: The invention relates to novel 3(2H)-pyridazinone-derivatives of the general formula (I), pharmaceutical compositions containing them and process for their preparation. In the general formula (I) ##STR1## stands for an ethyl or propyl group substituted by a terminal halogen atom or a hydroxyl or NR.sup.1 R.sup.2 group, whereinR.sup.1 represents hydrogen atom or an unsubstituted or optionally substituted benzyl group;R.sup.2 represents hydrogen atom or an unsubstituted or optionally substituted benzo[1,4]dioxan-2-yl-methyl or -ethyl group or a (CH.sub.2).sub.n --R.sup.3 group, whereinn is 2 or 3; andR.sup.3 stands for an unsubstituted or optionally substituted phenoxy or phenylthio group; andX stands for a hydrogen or halogen atom or an unsubstituted or optionally substituted, saturated or unsaturated 5- or 6-membered heterocyclic group containing a nitrogen atom and optionally an additional heteroatom, e.g.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: May 2, 1989
    Assignee: Richter Gedeon Vegyeszeti Gyar T.R.
    Inventors: Endre Kasztreiner, Gyorgy Rablocsky, Nandor Makk, Laszlo Jaszlits, Peter Matyus, Gyorgy Cseh, Ildiko Pribusz nee Rapp, Klara Czako, Eszter Diesler, Istvan Elekes, Laszlo Kaufer, Maria Kuhar nee Kurthy, Judit Kincsessy, Judit Kosary, Gyongyi Nagy nee Csokas