Patents by Inventor Clifford O. Clevenger

Clifford O. Clevenger 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).

  • Structure and method for manhole wall sealing
    Publication number: 20110008108
    Abstract: Structures and methods for repair of leaks in the walls of manhole assemblies are provided through use of at least one repair panel comprising a structural member and a sealing member attached to one another. In some embodiments, a plurality of repair panels as provided are present in an end-to-end configuration to yield a seal the extends coextensively with the inner wall surface of a manhole assembly. In some embodiments, a plurality of repair panels as provided are present in an side-by-side configuration on the inner wall surface of a manhole assembly.
    Type: Application
    Filed: July 7, 2009
    Publication date: January 13, 2011
    Inventor: Clifford O. Clevenger