Organoaluminum electrolytes for the electrolytic deposition of high-purity aluminum
CA 2018130 C · Owner: Studiengesellschaft Kohle M.B.H. · Inventors: Mehler, Klaus-Dieter; Lehmkuhl, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to organoaluminum electrolytes for the electrolytic deposition of high-purity aluminum, which are characterized in that they contain mixtures of organoaluminum complex compounds of the type MF ~ 2 AlR3 (A), wherein M represents potassium or mixtures of K with a maximum of about 15% by mole of sodium, as well as trialkylaluminum AlR3 (B) which has not been complexed to an alkali metal fluoride in a molar ratio of A . B of from 4:0.6 to 4:2 as well as a, polyfunctional Lewis base of the type R'-OCH2CH2-OR" (C) in a molar ratio of B : C of from 1:0.5 to 1:1. The organyl radicals R in A are ethyl groups (Et) methyl, groups (Me) and iso-butyl groups (iBu) in a molar ratio …
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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 December 28, 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.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.