Process adapted to provide on a metallic substrate a protective coating based on haxavalent chromium, bath used in the said process and commercial form of the components of the bath
CA 2029381 A1 · Owner: Bernard, Daniel · Inventors: Schapira, Joseph; Droniou, Patrick; Pelletier, Patrice
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process adapted to provide on a metallic substrate a, protective coating against corrosion based on hexavalent chromium, without any necessity of a supplementary protection, the said process which comprises: - a step for the preparation of the metallic substrate by degreasing, possibly followed by mechanical or chemical pickling, - a step comprising the use by immersion or spraying of a bath adapted to provide on the metallic substrate the contemplated protective coating and, - a curing step at high temperature is characterized by the fact that the above-mentioned bath comprises at least:, - a metal in the form of particles - chromic acid and/or one of its derivatives as oxydizing agent, - …
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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 November 6, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2012.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.