Patents by Inventor Helmut Neidhardt

Helmut Neidhardt 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).

  • Tubular fabric coated with plastics or synthetic rubbers
    Patent number: 4025684
    Abstract: The disclosure embraces an inflatable flat tubular fabric which is coated on its outside surfaces with synthetic rubber or plastic and is constructed by weaving the fabric in tubular form with basic threads having a given tensile strength with the two layers of the fabric being joined together by auxiliary threads which have a substantially lower tensile strength than the basic threads so that, when the fabric is inflated, the auxiliary threads will be broken to permit expansion of the fabric to its full volume capacity.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: May 24, 1977
    Inventor: Helmut Neidhardt