Method for coating metallic surfaces and use of the substrates coated in this manner
CA 2440151 A1 · Owner: Wendel, Thomas · Inventors: Wendel, Thomas; Kolberg, Thomas; Rengnet-Ferrier, Severine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for coating metallic surfaces by a manganesezinc phosphatizing process, using an aqueous phosphatizing solution in which , nickel is deliberately not added. Said method is characterized in that the zinc: manganese weight ratio of the phosphatizing solution is maintained in the region of between 0.05: 1 and 0.99: 1 and that the phosphatizing solution has the following contents: between 0.05 and 5 g/l zinc between 0.075 and 5.2 , g/l manganese and between 0.008 and 0.050 g/l copper and/or hexafluoride complexes of titanium, hafnium and/or zirconium totalling between 0.002 and 0.5 g/l, calculated as F6. The invention also relates to the use of the metal …
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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 March 1, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 2024.
- 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.