Preparation of biscarbamates and novel biscarbamates
CA 1292009 C · Owner: Degner, Dieter · Inventors: Hannebaum, Heinz; Degner, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Biscbroamates including novel, one, of the general formula I, where R is alkyl of 1 of 8 carbon atoms and X is a hydrocarbon radical of 2 to 60 carbon atoms in which one or more carbon atoms may be replaced by hetero atoms and which may contain halogen atoms or ester carbonyl or, nitrile groups are prepared by electrochemically oxidizing formamides of the general formula, II, in the presence of an alkanol of the formula ROH and of an ionic halide.
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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 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2008.
- 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.