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).

  • GENERATOR UNIT AND METHOD FOR OPERATING A GENERATOR UNIT IN A POWER PLANT
    Publication number: 20240128753
    Abstract: A generator unit as a component of a power plant connected to the electrical grid, includes a first generator with a rotor connected to a drive turbine via a shaft, a second generator and a three-winding high-voltage transformer. The first generator is an active power generator and the second generator is a purely reactive power generator, and the first and the second generators are connected to the electrical grid via a separate generator output line and via the three-winding high-voltage transformer.
    Type: Application
    Filed: October 9, 2020
    Publication date: April 18, 2024
    Applicant: Siemens Energy Global GmbH & Co. KG
    Inventors: Klaus Ehrhardt, Lothar Pistor, Wieland Uecker, Ronald Völzke
  • 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