Aqueous electroplating chloride bath for the preparation of a zinc or zinc alloy coating
CA 2242019 A1 · Owner: Marolleau, Isabelle · Inventors: Petitjean, Jacques; Marolleau, Isabelle; Klam, Genevieve
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bath with a pH of over 4 containing more than 1 mole/litre of Zn2+ ions and at least one polyethylene glycol polymer of the general formula R1-O-(CH2-CH2-O)n-R2 where n ~ 13 and where the concentration of polymer in the bath is adjusted to incorporate into the coating an organic compound at a % by weight of over 0.1% expressed as weight of carbon relative to weight of coating. This bath is designed for high current densities and the coating applied on the sheet steel provides both a levelling effect and improved corrosion resistance.
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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 June 25, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2020.
- 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.