Patents by Inventor Hank Kulzer

Hank Kulzer 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).

  • Patent number: 4321740
    Abstract: A method and apparatus are provided for relining a fluid transmission pipe in which a deformable stiffener is inserted in one end of a plastic liner, the plastic liner is inserted into the transmission line with the stiffener first, a plastic sealant is placed around the end of the plastic liner in the transmission pipe and the stiffener is expanded intermediate its ends in the plastic liner to force the liner end into tight contact with the transmission pipe interior with sealant surrounding the contact area.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: March 30, 1982
    Assignee: Inner-Tite Corporation
    Inventors: George W. Davis, Hank Kulzer, Anker Nielsen