Patents by Inventor Peter Metzenauer

Peter Metzenauer 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).

  • Phthalazinone derivatives that modulate multi-drug resistance
    Patent number: 5556856
    Abstract: Phthalazinone derivatives and their optical isomers are used as medications to combat heart rhythm disturbances, to combat pain and to break through multi-drug resistance.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: September 17, 1996
    Assignee: Asta Medica Aktiengesellschaft
    Inventors: Jurgen Engel, Bernhard Kutscher, Ilona Fleischhauer, Stefan Szelenyi, Peter Metzenauer, Ulrich Werner
  • 4,5-dihydro-4-oxo-pyrrolo[1,2-a]quinoxalinones and corresponding aza analogs and a process for their preparation
    Patent number: 5405847
    Abstract: Novel compounds of the formula ##STR1## where the phenyl ring can also contain a nitrogen atom instead of a CH group, R.sub.1 is C.sub.2 -C.sub.6 -alkenyl, C.sub.2 -C.sub.6 -alkynyl, hydroxy, C.sub.1 -C.sub.6 -alkoxy, C.sub.3 -C.sub.6 -alkenyloxy, C.sub.3 -C.sub.6 -alkynyloxy, C.sub.2 -C.sub.6 -alkanoyloxy, benzoyloxy, morpholinocarbonyloxy, C.sub.1 -C.sub.6 -alkyloxycarbonyloxy, C.sub.1 -C.sub.6 -alkylaminocarbonyloxy, C.sub.1 -C.sub.6 -dialkylaminocarbonyloxy or the group -Alk-A, where Alk represents C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -hydroxyalkyl or C.sub.3 -C.sub.6 -cycloalkyl and the symbol A represents hydrogen or other substituents.R.sub.2, R.sub.3 and R.sub.4 represent various substituents, where R.sub.1 may also be hydrogen, when R.sub.2 is the group ##STR2## and R.sub.5 represents phenyl, C.sub.1 -C.sub.4 -alkoxyphenyl or diphenylmethyl and R.sub.3 and R.sub.4 are hydrogen and their salts. The compounds provide anti-allergic, anti-asthmatic, anxiolytic and hypotensive effects.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: April 11, 1995
    Assignee: Asta Medica Aktiengesellschaft
    Inventors: Hans-Reinhold Dieter, Jurgen Engel, Karl-Heinz Klingler, Bernhard Kutscher, Stefan Szelenyi, Ute Achterath-Tuckermann, Jurgen Schmidt, Peter Metzenauer