Surface treatment for improved hardness and corrosion resistance
CA 2424030 A1 · Owner: Meckel, Nathan K. · Inventors: Meckel, Nathan K.; Campbell, Dana Howard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article is protected with a wear-resistant coating. The wear-coated article is thereafter treated to produce a chemical conversion coating on any portions of the surface of the article accessible through micropores in the wearresistant coating. For steel articles, the wear-resistant coating is preferably a titanium nitride-based intermetallic compound such as TiN Ti2N, (TiAl)N, Ti(CN), (TiAl)(CN), ZrN and CrN, and the chemical conversion coating is preferably a phosphate-based compound.
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 September 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2023.
- 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.