Patents by Inventor Erhard Langenscheid

Erhard Langenscheid 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).

  • .beta.-D-1-(6-amino-9H-purin-9-yl)-1-deoxy-2,3-di-O-nitroribofur anuronethylamide
    Patent number: 4122172
    Abstract: The title compound, prepared by nitrating .beta.-D-1-(6-amino-9H-purin-9-yl)-1-deoxyribofuranuronethylamide, is physiologically active and pharmacologically acceptable. It is useful for increasing coronary blood flow and is administrable, e.g., in the form of a medicament composition.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: October 24, 1978
    Assignee: Byk Gulden Lomberg Chemische Fabrik GmbH
    Inventors: Erhard Langenscheid, deceased, Kurt Klemm
  • Substituted N-acyl-N"-(3-amino-2-cyanoacryloyl-)formamidrazones
    Patent number: 4051242
    Abstract: Therapeutically-active and pharmacologically-acceptable N-acyl-N" -(3-amino-2-cyanoacryloyl)-formamidrazones and their pharmaceutically-acceptable acid-addition salts inhibit xanthine oxidase and are useful as the active ingredient in medicaments for the treatment of gout.
    Type: Grant
    Filed: August 22, 1974
    Date of Patent: September 27, 1977
    Assignee: Byk Gulden Lomberg Chemische Fabrik GmbH
    Inventors: Kurt Klemm, Erhard Langenscheid
  • 4(1H)-pyrimidinones
    Patent number: 4034093
    Abstract: Therapeutically-active and pharmacologically-acceptable 1-amido-5-cyano-4(1H)-pyrimidinones and their pharmaceutically-acceptable acid addition salts inhibit xanthineoxidase and are useful as the active ingredient in medicaments for the treatment of gout. Such pyrimidinones are prepared by treating 2-(acyl) hydrazonomethyl-3-chloro or hydroxy-4-aza-2,4-pentadienenitriles with acid.
    Type: Grant
    Filed: September 4, 1973
    Date of Patent: July 5, 1977
    Assignee: Byk Gulden Lomberg Chemische Fabrik GmbH
    Inventors: Kurt Klemm, Erhard Langenscheid
  • Formylazapentadienenitriles
    Patent number: 3944667
    Abstract: Insecticidal, fungicidal and bactericidal substituted formylazapentadienenitriles are prepared by hydrolyzing an azapentadienylidene ammonium salt of the formula ##EQU1##
    Type: Grant
    Filed: September 4, 1973
    Date of Patent: March 16, 1976
    Assignee: Byk Gulden Lomberg Chemische Fabrik GmbH
    Inventors: Kurt Klemm, Erhard Langenscheid