Patents by Inventor Karl-Theo Witter

Karl-Theo Witter 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).

  • Method employing steam to sterilize packaging material
    Patent number: 4533515
    Abstract: In the steam sterilization of packaging material, such as blanks intended for containers of acid liquids, the improvement which comprises employing a packaging material with a surface germ-count of less than approximately 1 germ/dm.sup.2 and using steam at atmospheric pressure. The packaging material can comprise a reel of fibrous material coated on one or both surfaces with plastic or it can comprise plastic-coated containers. After steaming, it may be hot air dried.
    Type: Grant
    Filed: March 22, 1984
    Date of Patent: August 6, 1985
    Assignee: Papier-und Kunststoff-Werke Linnich GmbH
    Inventors: Karl-Theo Witter, Peter Friedrich, Ulrich Strole