Patents by Inventor Hans Struck

Hans Struck 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).

  • Reclosable cross-bottom sack
    Patent number: 4284229
    Abstract: A reclosable cross-bottom sack is provided over the cross-bottom with a cover sheet having an incision and lines of weakness. A flattened tubular plastics emptying nipple for the sack is folded and cut at one end to define flaps, extends through the incision and is secured to the sheet by its flaps to lie between the cross-bottom and the cover sheet.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: August 18, 1981
    Assignee: Windmoller & Holscher
    Inventors: Horst Schmidt, Hans Struck