Improved bolster land arrangement for a railcar truck
CA 2233870 C · Owner: Moehling, Charles · Inventors: Moehling, Charles; Hawthorne, V. Terrey; Spencer, Charles P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A railway truck assembly has an arrangement for constraining the free travel clearance between the mated bolster and side frame at the side frame window and more particularly for, reducing or eliminating the clearance or separation gap between the bolster lands and the side frame column wall at the outer edges of the bolster lands and the column wall for reduction of truck warping during service.
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 30, 1998 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2020.
- 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.