Patents by Inventor Andreas Kwetkus

Andreas Kwetkus 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 for charging particles
    Patent number: 5288305
    Abstract: In order to enhance the efficiency of charging in a friction charger, it is proposed to precharge the particles before the first collision with the walls by making use of the photoeffect. This is performed, preferably, through irradiating the particles using UV radiation from a UV excimer radiator.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: February 22, 1994
    Assignee: Asea Brown Boveri Ltd.
    Inventors: Bernd Gellert, Andreas Kwetkus