Passivation method
CA 2072189 A1 · Owner: Kovacs, Paul · Inventors: Kovacs, Paul; Davidson, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides novel passivated implants and passivation methods that provide superior corrosion resistance and surface performance characteristics ad compared to conventional nitric acid passivation. The method uses either the spontaneous or galvanic passivation of metallic prosthetic implants in aqueous alkali salt solution containing non-aggressive oxyanions to produce a thin and uniform passive coating on the metal implant, thereby rendering the implant more stable in the biological environment.
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 June 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 2014.
- 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.