Process for preparing 5-ethylidene-2-norbornene
CA 1267161 C · Owner: Fukao, Masami · Inventors: Suzukamo, Gohfu; Fukao, Masami
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the preparation of 5-ethylidene-2-norbornene by the isomerization 5-vinyl-2-norbornene in the presence of a catalyst. The catalyst is a solid base catalyst which is prepared by reacting alumina and an alkali metal hydroxide at a temperature of 200 to 500°C and then reacting the reaction product with an alkali metal at a temperature of 180 to 350°C or a solid base, catalyst which is prepared by reacting a water-containing alumina and an alkali metal in an amount which corresponds to the molar equivalent of the water contained in the alumina at a temperature in the range between the melting point of the alkali metal and 500°C and then reacting the reaction product …
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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 27, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2007.
- 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.