Process for producing manganese-containing phosphate coatings on metal surfaces
CA 2058631 A1 · Owner: Henkel Kommanditgesellschaft Auf Aktien · Inventors: Gottwald, Karl-Heinz; Riesop, Joerg; Hamacher, Matthias
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The invention relate to a process for producing phosphate coatings containing manganese on surfaces of steel, galvanized steel, aluminum and/or the alloys thereof or of aluminum-steel composite materials by spraying or spray-immersion with an aqueous solution containing, 0.8 to 1.4 g/l of Zn2+, 0.6 to 2.0 g/l of Mn2+ 0.3 to 1.4 g/l of Ni2+, to 25 g/l of PO43- 2 to 10 g/l of NO3-, 0.2 to 1.0 g/l of F3- and as an accelerator of the phosphate deposition 0.04 to 0.12 g/l of NO2-, 0.6 to 2.0 g/l of ClO3- and/or 0.2 to 1.0 g/l of sodium-3-nitrobenzenesulfonate, the content of free acid having been adjusted to from 1. 4 to 1. 8 points and the solution having a total …
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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 May 25, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 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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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.