Patents by Inventor William E. Hallatt

William E. Hallatt 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: 4042559
    Abstract: A composite abrasion resistant, coated and abrasive containing pipe lining sheet comprises a pipe lining layer consisting from about 30 to about 70% by volume of abrasion resistant abrasive granules (preferably from about 45 to about 55% by volume of silicon carbide, alumina or alumina/zirconia granules of blocky shape, nonaligned orientation and diverse size) and from about 70 to about 30% by volume (preferably from about 55 to about 45% by volume) of a flexible organic resin binder, preferably phenolic, polyurethane, polybutadiene-acrylonitrile or epoxy resins. The pipe lining sheet can optionally be provided with a paper or textile backing bonded thereto, or with a backing of nonabsorbent, nonreactive film such as polyester, which can later be stripped off the abrasion resistant pipe lining material prior to use for lining pipes.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: August 16, 1977
    Assignee: The Carborundum Company
    Inventors: Paul N. Abelson, Halsey W. Buell, William E. Hallatt