Process for the graphitization of cathode blocks
CA 2470760 A1 · Owner: Daimer, Johann · Inventors: Daimer, Johann; Hiltmann, Frank; Mittag, Joerg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method for graphitizing cathode blocks used for the electrolytic production of aluminum according to the longitudinal graphitization method. The cathode blocks are arranged in a longitudinal graphitizing oven in such a way that current conduction between the individual electrode blocks is established by a conductive contact body which touches the end surfaces of two adjacent electrode blocks and has an upward-facing extension on the side facing the top side of the oven. Also disclosed are the cathode blocks produced by the inventive method and the use thereof for the electrolytic reduction of aluminum oxide.
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
- Filed December 19, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2024.
- 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.