A beam
CA 2503496 A1 · Owner: Charlwood, Grant · Inventors: Charlwood, Grant
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roll formed beam (10) of substantially rectangular cross-section formed from a unity piece of metal. The beam includes opposed first (44) and second (46) substantially parallel walls formed with at least three adjacent layers of said piece of metal (44 a, b, c, and 46 a b, c). The beam (40) also includes , opposed third (48) and fourth (5) substantially parallel walls between the first (44) and second (46) walls. One of the third (48) or fourth (50) walls has a seam (52) joining two opposed longitudinal edges of the piece of metal. A method of roll forming a beam (4) is also disclosed.
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 October 22, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2025.
- 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.