Surface treatment of metals and alloys
CA 2000320 A1 · Owner: Morton, Peter H. · Inventors: Turner, Rhoderick N.; Boston, Malcolm E.; Bell, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: Surface Treatment of Metals and Alloys The invention provides a method of treating a component made of metal or alloy, in which the component is bombarded with nitrogen ions in a vacuum system at a temperature below that conventionally used for plasma nitriding. The nitrogen ion bombardment is preferably carried out at a temperature below 850°C and for a period of time in the range of 1-2 hours. This method allows surface treatment of a component to be carried out relatively quickly. The invention also provides a method of treating a component made of metal or alloy, in which the surface of the component is cleaned by ion bombardment; the cleaned component is bombarded with nitrogen …
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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 October 6, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2011.
- 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.