Patents by Inventor Stefan Simon

Stefan Simon 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 for making dimensionally stable articles
    Patent number: 4081884
    Abstract: A method is provided for manufacturing a dimensionally stable compressed article such as an absorbent catamenial tampon comprising compressed cellulosic fibers. The method comprises the steps of first radially compressing a cylindrical blank to form a radially compressed blank having a length in excess of the desired finished length; then axially compressing the blank in a heated chamber to a length less than the desired finished length; then allowing the blank to expand to the desired finished length; and then maintaining the blank at this length while still in the heated chamber until the blank obtains the desired stability.
    Type: Grant
    Filed: May 11, 1977
    Date of Patent: April 4, 1978
    Assignee: Dr. Carl Hahn, GmbH
    Inventors: Wolfgang Johst, Axel Friese, Stefan Simon