Article having a decorative and protective multi-layer coating
CA 2236167 C · Owner: Sugg, Rolin W. · Inventors: Welty, Richard P.; Sugg, Rolin W.; Moysan, Stephen R. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article is coated with a multi-layer coating comprising a nickel layer, a tin-nickel alloy layer a non-precious refractory, metal layer a sandwich layer comprised of a plurality of alternating layers of non-precious refractory metal compound and of a non-precious refractory metal, a non-precious refractory metal compound layer, and a layer comprised of a non-precious refractory metal oxide or the reaction products of a non-precious refractory metal, oxygen and nitrogen.
Read the whole patent
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 April 29, 1998 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 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.