An energy absorption system
CA 2204528 C · Owner: Kothmann & Kothmann, Inc. · Inventors: Pfeifer, Brian G.; Sicking, Dean L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To reduce the danger of bodily harm to occupants of vehicles that leave the roadway, a guardrail system (10) includes a guardrail terminal (18) and a guardrail (16). The guardrail terminal (18) includes cutting means (70) positioned to cut said guardrail (16) as it moves within the said guardrail terminal (18) and the guardrail terminal (18) moves with respect to the guardrail (16) to cut the guardrail (16) when impacted by a vehicle.
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 November 6, 1995 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2017.
- 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.