Patents by Inventor David Erhardt

David Erhardt 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 OF FILLING LARGE VOIDS WITH CERAMIC FIBER FOAM AND KILN CAR BLOCKS MADE VIA THE SAME
    Publication number: 20080248436
    Abstract: A method of filling cavities in refractory bodies, comprising lofting refractory fibers in flowing air, mixing lofted refractory fibers with refractory foam to generate a fibrous refractory foam, and filling a substantially enclosed cavity in a refractory material with fibrous refractory foam to produce a foam-filled cavity, heating the foam-filled cavity to a first drying temperature for sufficient time to dry the fibrous refractory foam filling, and heating the foam-filled cavity to a second substantially higher firing temperature to produce a fired body. The substantially enclosed cavity is defined by at least one refractory wall.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 9, 2008
    Inventor: David Erhardt