Patents by Inventor Marshall Duncan

Marshall Duncan 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).

  • Dry kiln heat retention system
    Patent number: 7370434
    Abstract: A lumber drying system includes a drying compartment having an arched roof, a plurality of baffle boxes, wherein each baffle box further includes a main chamber, an air intake that forms an entrance into the chamber, an air outtake that forms an exit from the chamber, a plurality of interleaved plates disposed within the chamber between the air intake and the air outtake, and a water outlet disposed beneath and in communication with the plurality of interleaved plates. The plurality of baffle boxes are distributed on the sides of the roof, each air intake of the baffle boxes being in communication with an upper portion of the drying compartment.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: May 13, 2008
    Assignee: Steely Lumber Company, Inc.
    Inventor: Marshall Duncan
  • Dry kiln heat retention system
    Publication number: 20060191158
    Abstract: A lumber drying system includes a drying compartment having an arched roof, a plurality of baffle boxes, wherein each baffle box further includes a main chamber, an air intake that forms an entrance into the chamber, an air outtake that forms an exit from the chamber, a plurality of interleaved plates disposed within the chamber between the air intake and the air outtake, and a water outlet disposed beneath and in communication with the plurality of interleaved plates. The plurality of baffle boxes are distributed on the sides of the roof, each air intake of the baffle boxes being in communication with an upper portion of the drying compartment.
    Type: Application
    Filed: February 24, 2006
    Publication date: August 31, 2006
    Inventor: Marshall Duncan