Patents by Inventor Lawrence C. Hoffmann, Jr.

Lawrence C. Hoffmann, Jr. 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).

  • Easy open end
    Patent number: 4036159
    Abstract: This invention relates to an improved easy open ecological closure member for containers as well as processes and equipment for producing the same. The container closure member is provided with one or more readily depressible and hinged opening tabs or buttons, that do not readily separate from the closure member upon becoming depressed due to the novel structure and arrangement of the buttons, their base portions and their frangible tear line sections all of which contribute to a selective concentration of stresses in the frangible tear line sections during opening.
    Type: Grant
    Filed: February 10, 1976
    Date of Patent: July 19, 1977
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventors: Gordon R. Gane, Lawrence C. Hoffmann, Jr.
  • Easy open end
    Patent number: 3967751
    Abstract: This invention relates to an improved easy open ecological closure member for containers as well as processes and equipment for producing the same. The container closure member is provided with one or more readily depressible and hinged opening tabs or buttons, that do not readily separate from the closure member upon becoming depressed due to the novel structure and arrangement of the buttons, their base portions and their frangible tear line sections all of which contribute to a selective concentration of stresses in the frangible tear line sections during opening.
    Type: Grant
    Filed: June 13, 1975
    Date of Patent: July 6, 1976
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventors: Gordon R. Gane, Lawrence C. Hoffmann, Jr.