Patents by Inventor Joseph A. Kupke

Joseph A. Kupke 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).

  • Filter underdrain with prefabricated cells
    Patent number: 6048132
    Abstract: An improved method for constructing filter underdrain systems may be provided which uses prefabricated underdrain cells. The prefabricated underdrain cells may have a one piece construction having side walls and a bottom. The side walls may include a porous plate support ledge with a ridge at the center of the ledge. The ridge helps ensure that the sealant forms a uniform and effective gasket when the porous plates are installed.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: April 11, 2000
    Assignee: Agency Environmental, Inc.
    Inventors: John A. Kupke, Joseph A. Kupke, John F. Pfeifer, Jr.