Roadside barrier
CA 2188475 C · Owner: Thompson, Jeffrey · Inventors: Krage, William G.; La Turner, John; Welch, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An energy absorbing roadside barrier includes an elongated container configured to receive and hold a volume of water. The container defines a pair of sidewalls having sufficient rigidity to stand alongside a roadway and sufficient resilience to deform upon an impact by a vehicle and to recover their shape after at least some impacts. The barrier also includes at least one port extending between the sidewalls preferably sized to receive a fork of a forklift.
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 September 13, 1993 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2015.
- 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.