Preparation of electrically conductive polyenes
CA 1134844 A · Owner: Basf Aktiengesellschaft · Inventors: Paust, Joachim; Feichtmayr, Franz; Naarmann, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of an electrically conductive polyene wherein a polyene which contains one or more chain members of the formula, where R is hydrogen or methyl and which contains a, total of not less than seven aliphatic double bonds is, treated, in the absence of moisture and of oxygen with, a strong Lewis acid having a pka of from -10 to +4 or, with an alkali metal.
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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 November 2, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 1999.
- 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.