Long life anode for electrowinning
CA 1332159 C · Owner: Krueger, Dale Wiliam · Inventors: Tyroler, Paula Milada; Krueger, Dale Wiliam; Sanmiya, Tei Stewart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An anode for electrowinning in an aqueous sulfuric acid-containing electrolytic cell. A plate member has a lead or lead alloy outer surface. The outer surface is rough and contains elevations and depressions. Lead sulfate oxidized from the rough outer surface of the lead plate member to adhere to the elevations and depressions of the rough outer surface for reducing flaking of lead sulfate. A support means suspends the lead plate member in the electrolyte.
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 September 27, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 27, 2011.
- 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.