Patents by Inventor Thomas Stefanovski

Thomas Stefanovski 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).

  • Patent number: 6808690
    Abstract: A catalyst element for a stacked reactor for generating hydrogen from hydrocarbons includes a catalyst disc of porous material and a solid connection element. The catalyst-side end of the connection element is at least partially enclosed by the catalyst disc and is connected to this disc. The catalyst-side end of the connection element may have a mediator layer that is joined to the connection element over the entire area by sintering, soldering, or adhesive bonding. The mediator layer is joined to the catalyst disc over the entire area by sintering. Attachment means are provided at the exposed end, which is remote from the catalyst, of the connection element.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: October 26, 2004
    Assignee: Ballard Power Systems AG
    Inventors: Andreas Ebert, Oskar Lamla, Thomas Stefanovski
  • Patent number: 6486087
    Abstract: A method for periodically reactivating copper-containing catalyst material includes applying an oxygen-containing gas stream to the catalyst material for reactivation purposes. When the reactor is in the warm operating state, the application of the oxygen-containing gas stream to the catalyst material is interrupted when the monitored temperature of the catalyst material exceeds a maximum level which is a predeterminable tolerance level above a predetermined operating temperature. In cold-start phases, initially a mixture of a fuel and an oxygen-containing gas stream is fed to the catalyst material, until the monitored temperature of the catalyst material exceeds a predeterminable switch-over level, after which only the oxygen-containing gas stream is supplied. To keep the reactor warm after operation has ended, the reactivation can be activated each time the temperature falls below a further threshold level.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: November 26, 2002
    Assignee: Xcellsis GmbH
    Inventors: Carlo Saling, Martin Schuessler, Thomas Stefanovski
  • Publication number: 20020028746
    Abstract: A catalyst element for a stacked reactor for generating hydrogen from hydrocarbons includes a catalyst disc of porous material and a solid connection element. The catalyst-side end of the connection element is at least partially enclosed by the catalyst disc and is connected to this disc. The catalyst-side end of the connection element may have a mediator layer that is joined to the connection element over the entire area by sintering, soldering, or adhesive bonding. The mediator layer is joined to the catalyst disc over the entire area by sintering. Attachment means are provided at the exposed end, which is remote from the catalyst, of the connection element.
    Type: Application
    Filed: August 8, 2001
    Publication date: March 7, 2002
    Inventors: Andreas Ebert, Oskar Lamla, Thomas Stefanovski