Patents by Inventor William Louis Pittelkow

William Louis Pittelkow 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).

  • Patent number: 7121409
    Abstract: A sachet [(10, 22, 110, 210, 510)] for the packaging and dispensing of an item or a flowable substance [(125)], such as a liquid, powder or paste, has a semi-rigid member [(112)] with a weakened region [(120)] formed thereon so that upon bending across the weakened region [(120)] the semi-rigid member [(112)] will fracture along the weakened region [(120)]. The sachet [(110)] also has a reservoir [(114)] formed by overlaid first and second flexible film layers [(116,118)] which are adapted to contain the flowable substance [(125)]. In one form, an annular region [(128)] of the second flexible film layer [(118)] immediately surrounding the aperture region [(126)] is sealed to the adjacent region of the semi-rigid member [(112)] so as to prevent leakage of the flowable substance [(125)] from within the reservoir [(114)]. In use, fracturing along the weakened region [(120)] will expose the aperture [(126)] so as to allow the flowable substance [(125)] to be dispensed.
    Type: Grant
    Filed: September 4, 2000
    Date of Patent: October 17, 2006
    Assignee: Snap Pak Industries (AUST) Pty Ltd.
    Inventors: Colin Henry Hamilton, Peter Charles Wilson, William Louis Pittelkow