Patents Assigned to MacMillan Bloedel Research
  • Ribbed waferboard product
    Patent number: 4904517
    Abstract: A ribbed particleboard (waferboard) product having substantially uniform density throughout is provided by forming a mat of wood particles and superimposing on the mat, ribs of such wood particles and then pressing the mat and ribs simultaneously to consolidate the product and provide the ribbed panel having one side substantially planar and the other side ribbed.
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: February 27, 1990
    Assignee: MacMillan Bloedel Research
    Inventors: Kenneth K. Lau, Robert M. Knudson