Patents by Inventor Gerhard Piriwe

Gerhard Piriwe 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).

  • Stopper made of foamed, thermoplastic synthetic material
    Publication number: 20050253306
    Abstract: The invention refers to a method for the production of a plug from foamed thermoplastic with a cork brand, by means of a laser beam. The invention is characterized in that the focus point of the used laser beam lies in a plane different from the surface of the plug. The basic idea is that to avoid damage to the thin plastic film, the energy needed for the color change of the pigments is applied, in low density for such a purpose, over a large period of time.
    Type: Application
    Filed: July 2, 2003
    Publication date: November 17, 2005
    Inventor: Gerhard Piriwe
  • Stopper of foamed thermoplastic synthetic material
    Patent number: 6528152
    Abstract: A stopper of foamed thermoplastic synthetic material for sealing bottles containing foodstuffs or beverages, with an inorganic pigment which is resistant to and suitable for foodstuffs and which changes color under the influence of heat being added to the synthetic material. A method of applying a cork stamp on the stopper which is exposed to the action of heat to color-activate the pigment in areas corresponding to a given pattern of a cork stamp.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: March 4, 2003
    Assignee: “P1”Handels GmbH
    Inventor: Gerhard Piriwe