Corrosion resistant stainless steel and method of making same
CA 2224055 C · Owner: Carey, Jay F. Ii · Inventors: Carey, Jay F. Ii; Zamanzadeh, Mehrooz; Hesske, Nicholas R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A colored, corrosion resistant architectural material having improved corrosion-resistant properties wherein the material includes stainless steel which is coated with a tin and the tin coated material is post-treated with an oxidizing solution to remove the tin coating to expose a barrier which includes an alloy of chromium, iron and tin. The barrier exhibits excellent corrosion resistance especially with respect to chlorine and has a dark grey or earth tone grey color.
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 November 16, 1994 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2016.
- 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.