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Expired Canadian patentCanada

Organoaluminum electrolytes and process for the electrolytic deposition of aluminum

CA 2018129 C · Owner: Studiengesellschaft Kohle M.B.H. · Inventors: Mehler, Klaus-Dieter; Lehmkuhl, Herbert

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Abstract From the Canadian patent

The invention relates to organoaluminum electrotyles for the electrolytic deposition of aluminum which are characterized in that they consist of KF . 2 AlEt3 (A), .KF . 2 AlMe3 (B) and MF . 2 A1(iBu)3 (C) wherein, M = sodium or potassium or a mixture of both in a molar, ratio of A:B:C of from 2:1:1 to 7:1:1 The organo-aluminum , electrolytes are dissolved in from 2 to 4.5 moles, based on the amount of MF employed of an, aromatic hydrocarbon which is liquid at 0 ~C. The invention further relates to a process for the electrolytic deposition of aluminum on electrically conductive materials by using said electrolytes.

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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

  • Filed June 1, 1990 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 1, 1990
GrantedAugust 10, 1999
Term endedJune 1, 2010
Patent numberCA 2018129 C
Classification (IPC)C25D3/44

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedJune 1, 1990Patent grantedAug 10, 1999Term endedJune 1, 2010

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.