Process for producing a para-substituted phenol derivative
CA 1234393 A · Owner: Hirai, Hidefumi · Inventors: Komiyama, Makoto; Hirai, Hidefumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
By reacting a phenol compound with an organic halide selected from the group consisting of a haloform a carbon tetrahalide and a substituted or unsubstituted allyl halide in the presence of an alkali metal hydroxide, using as a catalyst a fixed cyclodextrin having hydroxyl groups crosslinked with a bivalent hydrocarbon group having free valences at its both ends said hydrocarbon group having at least one hydrogen atom substituted or unsubstituted with a member selected from the group consisting of an alkyl group a halogen atom, and a hydroxyl group and containing or not containing at least one combination of two neighboring carbon atoms having therebetween at least one member selected from …
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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 March 22, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 22, 2005.
- 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
Timeline From CIPO dates
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.