Patents by Inventor William S. Callahan

William S. Callahan 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).

  • Waterproof thermal resistant packaging wrap
    Patent number: 5256462
    Abstract: A waterproof, thermal resistant packaging wrap, especially for large diameter cylindrical objects, such as oils of metal. The wrap comprises a layer of woven or unwoven, hydrophobic polymeric fabric, a layer of closed- or open-cell hydrophobic polymeric foam, and an intermediate layer comprising a plurality of parallel, elongated, reinforcing members. The reinforcing members comprise an extruded thermoplastic material, wrapped in a protective sheet and calendered to a thickness of at least about 1/10 inch, and width of about 3-4 inches.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: October 26, 1993
    Inventors: William S. Callahan, Karl B. Shields