Collars for the protection of anode hangers in aluminium electrolysis cells
CA 1330320 C · Owner: Norsk Hydro A.S · Inventors: Meisingseth, Leif
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protecting collar is being used in connection with the use of a protecting cover of carbonaceous paste (6) over the casting connection (7) between a carbon anode (2) and nipples (4) of an anode hanger (1), and around the lower part of the nipples (4). The collar (5,8,9) is placed around the nipples and the, carbonaceous paste is thereafter provided in the spacing between the collar and the nipple. It is made of cardboard preferably, brown paste board.
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 June 21, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 21, 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.