Electrolytic colouring of anodised aluminum
CA 1060376 A · Owner: Alcan Research And Development Limited · Inventors: Asada, Tahei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the process of electrocolouring aluminum by passage of alternating current between anodised aluminum and a counter-electrode while immersed in a bath containing a salt of one or more of the group nickel, cobalt, tin, the range of colours obtainable by the process is extended by subjecting aluminum, which has been anodised under conventional D.C. conditions while immersed in a sulfuric acid-based electrolyte, to an electrolytic treatment in a phosphoric acid based electrolyte before the electrocolouring operation. -1-
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 August 14, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 14, 1996.
- 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.