Patents by Inventor Johannes Gratz

Johannes Gratz 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).

  • Outer wall suspended in front of a metal structure
    Patent number: 4425745
    Abstract: An outer wall has plate-like sound damping elements with a rear vented facade liner as a weather protection, a plurality of thread bolts connected with cross bars and extending through the sound damping elements so that a portion of each of the thread bolts extends in a gap between the sound damping elements and the rear vented facade liner, a plurality of further thread bolts extending into the rear vented facade liner, a thread bushing composed of corrosion resistant material and screwed at least over that portion of each of the thread bolts to cover that portion, and a nut screwed at an outer side of the rear vented facade liner on an end portion of each of the further thread bolts.
    Type: Grant
    Filed: June 2, 1981
    Date of Patent: January 17, 1984
    Assignee: Steag Aktiengesellschaft
    Inventors: Johannes Gratz, Ferdinand Kerstges