Rail-fastening device
CA 2445115 C · Owner: Schwihag Gesellschaft Fur Eisenbahnoberbau Mbh · Inventors: Schwiede, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fastener has a base plate on which a stock-rail foot sits a slide chair fixed to the base plate and having an overhang overreaching an edge of the flange an abutment bump projecting downward from the overhang a passage opening adjacent and above the flange underneath the overhang and a flat upper surface. A retaining element engaged in the passage and bearing downward on the flange edge is engageable with the bump.
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 October 14, 2003 and granted July 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 14, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 14, 2025.
- 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.