Wooden x-beam
CA 2045295 C · Owner: Forintek Canada Corporation · Inventors: Lau, Peter Wing-Cheong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel wooden structural member, having in cross-section, an X-beam appearance, is disclosed and is useful as a beam, post or the like. It is very simple to fabricate and exhibits more flexible shear strength characteristics over known wooden I-beams. An elongate web section has wedge-shaped flange members securely attached to opposite sidewalls of the web so that in structural, member cross-section, the web is inclined and one surface of each of the flanges respectively forms all or a major part of the first and second or top and bottom surfaces of the structural member. The other surfaces of each of the wedge-shaped flanges are respectively in contact with and fixed to opposite sides of …
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
- Filed June 24, 1991 and granted May 21, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 2013.
- 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.