Patents by Inventor August Stoldt

August Stoldt 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).

  • Hollow thread bundle and method of its manufacture
    Patent number: 4559884
    Abstract: A hollow thread bundle for material and/or heat exchange has a plurality of substantially parallel hollow threads of substantially equal length, and a sewing seam wrapping around the plurality of hollow threads and including at least one sewing thread. The hollow thread bundle can be produced by wrapping the plurality of hollow threads by a sewing seam including at least one sewing thread.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: December 24, 1985
    Assignee: Akzo NV
    Inventors: August Stoldt, Heinz Stemig, Hans-Gunther Breidohr, Manfred Martin