Patents by Inventor Rolf D. Korte

Rolf D. Korte 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).

  • Plug-type bottle closure (plastic cork)
    Patent number: 4364486
    Abstract: A plug-type closure for a bottle, e.g. a wine bottle "cork" consists of a unitary circular cross section plug having a thin-wall core spacedly surrounded by the outer member and a plurality of radial webs bridging the outer member core. The core is formed with a corkscrew-shaped cavity including a screw-shaped groove whose depth and radius decreases progressively toward the bottom of the plug.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: December 21, 1982
    Inventors: Rolf D. Korte, Wilfried Rohlje