Long wafer waferboard panels
CA 1250728 A · Owner: Trus Joist Macmillan, A Limited Partnership · Inventors: Barnes, Derek
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A waferboard panel is made from long wafers to have the same strength properties as plywood. The panel comprises at least three layers of wood wafers having an initial aggregate specific gravity, less than about 0.6 oven dry weight with volume at 12% moisture content the panel having, face layers on outside surfaces and at least one core layer. The wafers in the face layers have a mean orientation not greater than about 10°, and lengths of at least about 6 inches preferably 12 inches. Average widths of the wafers in the face layers are in the range of about 0.3 to 2.0 inches and the panel has an oven dry wood density in the range of about 28 to 45 lbs. per cu. ft. with an MOR to density …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 7, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.