Patents by Inventor Robert A. Megraw

Robert A. Megraw 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).

  • Preparation of a three layer, fire retardant particleboard
    Patent number: 3996325
    Abstract: Fire retardant reconstituted cellulosic products are produced having fire retardancy substantially equal to conventional fire retardant products by impregnation of a portion of bark with a fire retardant and mixing said impregnated bark portion with another portion of bark which is untreated with a fire retardant. Additionally, a portion of wood chips is impregnated with a fire retardant and mixed with another portion of wood chips untreated with a fire retardant. Subsequently, the combined portions of bark and wood chips are formed into a three layer composite particleboard, having a bark core and wood chip surface, by pressing and heating.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: December 7, 1976
    Assignee: The Dow Chemical Company
    Inventor: Robert A. Megraw