Patents by Inventor Frank Schwarze

Frank Schwarze 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).

  • Sealing element
    Patent number: 4977018
    Abstract: The present invention relates to a sealing element of foam of delayed elastic resilience as a result of impregnation, in which, in order to obtain improved properties, on each cross-sectional plane (2) the delayed resilience is inherent in only a part of the elastically resilient volume and the remaining part (4) of the elastically resilient volume consists of closed-cell foam.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: December 11, 1990
    Assignee: Irbit Research & Consulting AG
    Inventors: Fritz Irrgeher, Frank Schwarze