Patents by Inventor Daniel Lagerfeldt

Daniel Lagerfeldt 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).

  • Child-resistant paperboard blister package and method of making the same
    Patent number: 5172812
    Abstract: A child resistant blister package includes a top sheet of paperboard having apertures. A thermoformed plastic sheet includes blisters which project through the apertures. A sheet of rupturable material closes off each blister. A bottom sheet of paperboard material is peelably laminated to the sheet of rupturable material. The bottom sheet includes a removable strip being defined by a continuous cut and having a pull-tab. The top sheet includes a severable pull tab extension. A tablet in a respective blister is removable therefrom by pressure being applied at a limited region of the blister, along the edge of the blister closest to the pull-tab, to rupture the rupturable sheet material. The tablet is not removable by pressure applied at a region remote from the pull tab.
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: December 22, 1992
    Assignee: Rexham Corporation
    Inventors: B. G. Wharton, Daniel Lagerfeldt, Alan Johnston