Method of stripping electrolytically deposited copper from a cathode
CA 1317907 C · Owner: Locke, Norman · Inventors: Middlin, Bruce; Locke, Norman; Kennedy, Alan William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Method of Stripping Electrolytically Deposited Copper from a Cathode, Electrolytically deposited copper is stripped from a cathode by first flexing the cathode to cause at least part of the copper deposit to separate from the cathode and then wedge-stripping or gas-blasting the remainder of the copper from the cathode. Perferably the cathode is a stainless steel sheet, and flexing is achieved by means of hydraulic rams which press the centre of the sheet first in one direction and then in the opposite direction. The cathode is supported along its bottom edge and held upright during the process.
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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 May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
- 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.