Cathodic current conducting elements for use in aluminum reduction cells
CA 1137445 A · Owner: Ppg Industries, Inc. · Inventors: Rahn, Henry W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cathode current conducting element for use in a metal e.g. aluminum reduction cell said element comprising a plate or tile formed of electrically conductive refractory material affixed to the carbon lining of the cell and in loosely restrained engagement therewith by means of a pin embedded in the carbon lining.
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 December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- 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.