Roadway
CA 2065235 C · Owner: Lesley, Lewis · Inventors: Lesley, Lewis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rail for vehicles to travel on is supported from a surface (14) by flanges (17) extending transversely from the top of the rail (11). The rail has a groove (16) for the road wheels. The rail is recessed into the road surface in a relatively shallow recess (12). The rail has a low profile since the loading on the rail is taken on the surface and is not carried down as usual to a substrate for the surface.
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 28, 1990 and granted November 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2012.
- 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.