Method of changing electrodes in a reduction cell
CA 1111375 A · Owner: Swiss Aluminium Ltd. · Inventors: Schaper, Hans; Weber, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Anodes are releasably attached to an anode beam. If an anode is burnt-away so far that it must be exchanged then it is exchanged with the help of a crane. The burntaway anode is pulled out until, after passing through a certain travel the surface facing the cathode has reached a predetermined horizontal plane. The distance travelled through until then is stored. The new anode is positioned with the surface facing the cathode in a second horizontal plane and is lowered towards the cathode in accordance with measurement of the stored travel the distance between the two horizontal planes and possibly with regard to different saggings of the crane caused by the different weights of the new and …
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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 October 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 1998.
- 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.