Treatment of zinc surfaces
CA 1090237 A · Owner: Oxy Metal Industries Corporation · Inventors: Sano, Yoshihide; Yashiro, Kuniji; Saida, Shigeki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for forming a zinc phosphate coating on a zinc surface comprises contacting the surface with an aqueous nitrate and ammonia-free solution containing zinc phosphate, nickel or cobalt, and hydrogen peroxide.
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
- Granted November 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 1997.
- 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.