Patents by Inventor Norbert Messner

Norbert Messner 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).

  • Disposable syringe
    Patent number: 5496285
    Abstract: A disposable syringe for administering liquid medicinal agents to live animal or human subjects is disclosed. The syringe comprises a hollow cylinder, filled with a medicinal agent, with which an injection needle is attached. The cylinder surrounds a piston that can be moved by means of a piston rod towards the injection needle. The piston is produced from a thermoplastically processable rubber mixture and is delimited in the direction of the medicinal agent by a peripheral sealing lip that contacts the hollow cylinder and that can be deflected in the radial direction.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: March 5, 1996
    Assignee: Firma Carl Freudenberg
    Inventors: Herbert Schumacher, Norbert Messner, Ernst Osen, Dirk Ecknig