Composite road safety slip rails made from metal and reinforced round wood and their methods of manufacture
CA 2094967 C · Owner: Duyck, Daniel · Inventors: Duyck, Daniel; De Maussion, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Composite slip rails for road safety made from round wooden bars reinforced with iron and comprising posts made from sectional iron and supporting each one a, spacer carrying a horizontal guard rail consisting of previously slotted round wooden beams reinforced with embedded metal fishplates providing for the cohesion of the wood and the connection of the elements.
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 April 27, 1993 and granted August 28, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 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.