Locomotive adhesion enhancing material mixtures
CA 2227351 C · Owner: Scott, Robert Thomas · Inventors: Scott, Robert Thomas; Lamba, Harinder Singh; Hou, Keping
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The adhesion between a locomotive drive wheel and supporting rail can be substantially increased by application of a powder mixture that contains a hard particle constituent preferably including alumina a soft particle, constituent preferably including titania and an iron oxide constituent. The, mixture may be in the form of a dry powder a paste with water or alcohol, vehicle or a metal composite that includes the powder.
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 January 16, 1998 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 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.