Patents by Inventor Clair A. Luce

Clair A. Luce 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).

  • Unitary reduction duct
    Patent number: 6543489
    Abstract: A unitary annular reduction duct suitable for joining pipes comprising an annular entrance collar of a given diameter, a corrugated and gradually inwardly tapered reduction portion that is contiguous with the collar section and a corrugated and substantially vertical annular exit portion contiguous with the reduction portion whereby the reduction portion has a diameter less than the collar section. The reduction duct may also be used to join pipes of different shapes.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: April 8, 2003
    Assignee: Building Materials Investment Corporation
    Inventors: Clair A. Luce, Ronald D. Shuck