Oxidative coupling of alkylphenols or 1-naphthols catalyzed by metal complexes of dicarboxylic acid
CA 1082210 A · Owner: Ici Americas Inc. · Inventors: Rutledge, Thomas F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkylphenol alkoxyphenol, or 1-naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 7.0-9.5 during the oxidative coupling reaction and a catalyst system comprising a cupric, cobaltous, manganous, nickelous chromic, or ferric chelate of a dicarboxylic acid compound. The mixture may optionally contain a surfactant.
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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 July 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 22, 1997.
- 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
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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.