Horizontal seam boxcar side wall
CA 2316148 A1 · Owner: Macdonald, Glenn · Inventors: Macdonald, Glenn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new method for fabricating smooth interior walls for steel boxcars. This boxcar side is, constructed using a horizontal offset seam joined by continuous groove weld. There are, no vertical butt welds in the side assembly. These butt welds and the reinforcement, associated with such welds has traditionally meant potential damage to sensitive cargo, like newsprint rolls.
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 August 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2022.
- 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.