Oxidative coupling of alkylphenols catalyzed by metal complexes of amino compounds
CA 1056390 A · Owner: Ici United States 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 are prepared by contacting an aqueous mixture of an alkyl phenol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 5-10 during the oxidative coupling reaction and a catalyst system comprising a cupric, cobaltous, manganous or ferric complex of, - an aliphatie hydroxy amine - a heterocyclic hydroxy amine, - a heterocyclic polyamine or - an aliphatic diamine, The mixture may optionally contain A ?urfactant. - 1 -
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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 June 12, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 1996.
- 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.