Process for the production of 3-aminomethyl-3,5,5-trimethylcyclohexylamine
CA 2062267 A1 · Owner: Schmitt, Hermann · Inventors: Huthmacher, Klaus; Schmitt, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Reductive amination of 1,3,3-trimethyl-5-oxocyclohexanecarbonitrile (IPN) with ammonia and hydrogen in the presence of nickel or cobalt Raney catalysts to form 3aminomethyl-3,5,5-trimethyl-cyclohexylamine takes place in one stage and provides a good yield whilst requiring no pressure distillation if, in addition, a co-catalyst of the series of a salt of Ni, Co, Y, or a La element is used at a rate of 0.01 to 0.5 mol per mol Raney catalyst.
Read the whole patent
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
- Filed March 4, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2014.
- 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.