Metallic salts which are difficult to dissolve in water, a process for their production, and their use as brighteners in electrolytic metal deposition
CA 2249533 A1 · Owner: Van Wijngaarden, Christel · Inventors: Kleinfeld, Marlies; Van Wijngaarden, Christel; Heyer, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns metallic salts of formula (I) which are difficult to dissolve in water, R1 and R2, which are identical or different designating , hydrogen or a lower alkyl group with between 1 and 3 carbon atoms M being the , cation of a metal which forms sulphides which are difficult to dissolve in water, and n meaning 1 or 2. The invention also concerns mixtures of these metallic salts. The metallic salts and their mixtures are produced by reacting carbon disulphide with ketones of formula (II) optionally with the addition , of non-aqueous inert solvents and strong alkali preferably potassium , hydroxide, whereupon by adding aqueous solutions of metallic salts of the metals M, …
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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.
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- Filed March 20, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 20, 2017.
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