Electroplating composition and process
CA 2073478 C · Owner: Macdermid, Incorporated · Inventors: Dobrovolskis, Pranas; Kupetis, Gytis-Kazimeras; Kashtalyanova, Nina
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention presented relates to (a) novel complexes of cobalt salts and copolymers of maleic anhydride, ethylenediamine and epichlorohydrin; (b) electroplating compositions for deposit of zinc-cobalt alloys wherein the cobalt is employed in the form of a complex of the above type; and (c) a process for the electrodeposition of bright zinc-cobalt alloys using the latter compositions. Optionally, the electroplating compositions also contain minor amounts of at least one of poly(ethylenediamine); a polycondensate of a di-alkyl diallylammonium chloride and sulfur dioxide; a polycondensate of ethylenediamine, epichlorohydrin and dichloroethane; a polycondensate of piperazine formaldehyde, …
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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 July 8, 1992 and granted September 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2014.
- 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.