Patents by Inventor Douglas E. Rogerson

Douglas E. Rogerson 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).

  • Wood composites with light colored glue lines
    Patent number: 5378544
    Abstract: A composite wood product made from discrete wood particles secured together by a cured bisphenol A formaldehyde resin cured from an A-stage bisphenol A formaldehyde resin having an A-stage bisphenol A to formaldehyde mole ratio of 1 to between 2.5 and 4 and between 3 and 11% of caustic measured as sodium hydroxide based on the weight of resin solids. Preferably the resin will include 2 to 10% urea based on the resin solids. The cured bisphenol A formaldehyde resin secures the wood particles together to form a composite wood product having light colored glue lines that substantially corresponds in color with the wood so that the glue lines tend to be unnoticeable.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: January 3, 1995
    Assignee: Trus Joist MacMillan, a Limited Partnership
    Inventors: Marek J. Gnatowski, Robert L. Pike, Douglas E. Rogerson
  • Adhesive extended composition
    Patent number: 3965056
    Abstract: An extender for synthetic resin glues made up of wood particles comminuted to the point where substantially no whole structure is left, and preferably most of the wood particles having hardened resin thereon to aid in the comminution thereof.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: June 22, 1976
    Assignee: MacMillan Bloedel Limited
    Inventors: Ronald M. T. Stout, Douglas E. Rogerson