Patents by Inventor Lothar Ehrhardt

Lothar Ehrhardt 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).

  • Stable solutions and processes for their preparation
    Patent number: 4138565
    Abstract: Solutions of certain hydrogenated ergopeptide alkaloids in mixtures of pharmacologically acceptable alcohols and water have improved stability. Preferred solvents are mixtures of ethanol, propylene glycol and glycerol containing from 15-40% wt. of water and having dielectric constants between 34 and 46. With these solutions it is not essential to carry out the filing operation under an inert atmosphere.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: February 6, 1979
    Assignee: Sandoz Ltd.
    Inventors: Lothar Ehrhardt, Ludwig Patt, Volker Hartmann