Patents by Inventor Harald Ritzel

Harald Ritzel 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).

  • Novel polypeptides with an .alpha.-amylase-inhibiting action, a process for their preparation, their use and pharmaceutical products
    Patent number: 4623714
    Abstract: Cyclic polypeptides of the formula I ##STR1## in which Z, S, Y and AS have the meanings given, a process for their preparation and their use are described. The compounds have an .alpha.-amylase-inhibiting action.
    Type: Grant
    Filed: November 6, 1984
    Date of Patent: November 18, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Laszlo Vertesy, Dominique Tripier, Harald Ritzel
  • Sulfonylureas pharmaceutical formulations based on these compounds and their use for treatment of diabetes
    Patent number: 4542139
    Abstract: Sulfonylureas of the formula ##STR1## in which Y denotes alkylene having 2-3 C atoms, R denotes alkyl having 1-4 C atoms, R.sup.1 denotes hydrogen, chlorine or methyl, and R.sup.2 denotes alkyl having 3-6 C atoms, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, cycloalkenyl, alkylcycloalkenyl or cycloalkenylalkyl, each having 5-8 C atoms, and their physiologically tolerated salts, and processes for their preparation and medicaments prepared therefrom.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: September 17, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Hitzel, Rudi Weyer, Karl Giesen, Harald Ritzel
  • Antidiabetic salicylic acid derivatives
    Patent number: 4542127
    Abstract: Salicylic acid derivatives of the formula I ##STR1## wherein R.sup.1, W, X, Y and Z have the meanings indicated or a physiologically tolerated salt thereof, processes for their preparation, pharmaceutical formulations based on these compounds and their use as antidiabetic agents.
    Type: Grant
    Filed: March 29, 1983
    Date of Patent: September 17, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Hitzel, Rudi Weyer, Karl Geisen, Harald Ritzel