Patents by Inventor Holger Stefan Appel

Holger Stefan Appel 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).

  • Method and device for cleaning a jet engine
    Patent number: 11215071
    Abstract: A method for cleaning a jet engine includes introducing a cleaning medium having solid materials into the engine by way of at least one discharging device, wherein the cleaning medium exits from the discharging device at an exit speed of 80 m/s or less.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: January 4, 2022
    Assignee: LUFTHANSA TECHNIK AG
    Inventors: Sebastian Giljohann, Holger Stefan Appel, Dirk Deja
  • METHOD AND DEVICE FOR CLEANING A JET ENGINE
    Publication number: 20180306055
    Abstract: A method for cleaning a jet engine includes introducing a cleaning medium having solid materials into the engine by way of at least one discharging device, wherein the cleaning medium exits from the discharging device at an exit speed of 80 m/s or less.
    Type: Application
    Filed: May 26, 2016
    Publication date: October 25, 2018
    Inventors: Sebastian Giljohann, Holger Stefan Appel, Dirk Deja