Process for producing wear-resistant boride layers on metallic material surfaces
CA 2244248 C · Owner: Trute, Gerhard · Inventors: Trute, Gerhard; Hunger, Hans-Jorg; Lobig, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is provided for producing wear-resistant boride layers on metal material surfaces. The process is characterized in that a boron halide selected from the group comprising boron trifluoride, boron tribromide boron, triiodide and their mixtures is mixed with hydrogen and optionally argon and/or nitrogen, in order to produce a reaction gas containing between 0.1 and 30 vol% boron halide. The resultant mixture is activated by a plasma discharge whereby boron is transferred from the plasma to the metal surface.
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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 January 23, 1997 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 23, 2019.
- 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.