Pair of guiding element of which on is made of a specific steel leading to improved anti-seizing performances
CA 2605752 C · Owner: H.E.F. · Inventors: Chaduiron, Eric; Jumaine, Shamba; Houze, Laurent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pair of guiding elements is characterized in that at least one of its elements is made of a steel containing at least 0.15 to 0.3 % by weight of carbon 2 to 5 % (preferably 2 to 3%) by weight of chromium at least 0.45 % (preferably no greater than 0.9%) by weight of molybdenum and at least 0.01 % by weight and no greater than 0.5 % (preferably no greater than 0.3%) of vanadium. This steel is nitrided after being shaped whereby obtaining a compound layer consisting of iron and nitrogen atoms of a thickness ranging from 5 to 50 micrometers. The steel can also contain 0.4 % to 1.5 % by weight of manganese.
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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 21, 2006 and granted June 23, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.