Patents by Inventor Alan R. Margreither

Alan R. Margreither 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).

  • Apparatus for producing spherical particles
    Patent number: 4046548
    Abstract: A system for producing glass spheres in which the combustion air introduced into the furnace is preheated. The furnace has a shroud enclosing at least a portion of its outer surface, and ambient air is introduced to the space between the outer surface and the shroud by means of a fan generating a slight positive pressure. Preheated air is removed from the shroud by a plurality of ducts leading to the source of heat.
    Type: Grant
    Filed: April 28, 1976
    Date of Patent: September 6, 1977
    Assignee: Potters Industries, Inc.
    Inventors: Thomas K. Wood, Alan R. Margreither