Iron-plated aluminum alloy parts and method for plating the same
CA 2107866 A1 · Owner: Troup-Packman, Sue · Inventors: Troup-Packman, Sue
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for plating aluminum alloy substrates (10) such as 390 aluminum alloy pistons (12) with iron compris-, es (a) plating on the aluminum substrate a layer of zincate from a zincate bath; (b) plating on the zincate layer a layer (14) of nickel from an electroless nickel bath; (c) plating on the nickel layer a layer (16) of iron from an iron ammonium sulfate bath; and (d) plating on the iron layer a layer (18) of tin from an alkaline tin bath. During the electroless plating, the zincate layer which pro-, tects the underlying aluminum against oxidation is sacri-, ficed. All of these baths are environmentally much safer than cyanide and chloride. They are also cost effective and can be …
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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 October 6, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2015.
- 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.