Chemical process for the preparation of para-alkenyl phenol
CA 1184569 A · Owner: Ethyl Corporation · Inventors: Roper, Jerry M.; Everly, Charles R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
p-Alkenyl phenols are prepared by reacting an alkylated phenol having a replaceable hydrogen atom at the 4- position with an aliphatic aldehyde having two carbon atoms up to at least 20 carbon atoms in the molecule and a secondary amine; the p-alkenyl phenols are converted to substiuted hydroxybenzaldehydes by direct oxidation in the presence of a catalyst.
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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 26, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 26, 2002.
- 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.