Sleepers for railway track systems
CA 2123038 C · Owner: Klein, Volker · Inventors: Kruger, Jurgen; Ohm, Klaus; Klein, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The proposed device is a sleeper for railway track systems, suitable for incorporation in the track near points more particularly near the drives and the associated tip fastenings for the points-tongues, which are adjustable via slide rods. The aim is to replace expensive manual operation by high-tech mechanised track construction using completely mechanised track-tamping machines, even near the points-tongue drive and the associated tip fastenings. To this end the, proposed sleeper is a box sleeper (1) characterised by a steel, trough or box-like sleeper section member (5) which has a cross-sectional width (15) and a cross-sectional height (16) matching that of a normal concrete or wooden …
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 May 6, 1994 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2016.
- 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.