Process for producing alkylenamines
CA 2005905 A1 · Owner: Nippon Shokubai Kagaku Kogyo Co. Ltd · Inventors: Tsuneki, Hideaki; Hayashi, Toshio; Shimasaki, Yuuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing an alkylenamine represented by the general formula, III, wherein R1 and R2 independently from each, other, represent a hydrogen atom or a methyl or ethyl group, R3 and R4, independently from each other, represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aminoalkyl group having 2 to 4 carbon atoms and n, is larger than m and is an integer of 1 to 5 which comprises reacting an aziridine compound of the general formula, I, wherein R1 and R2 are as defined with an amine of the general formula, II wherein R1, R2, R3 and R4 are as defined and m, is an integer of 0 to 4, in the liquid phase in the presence of a solid acid 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 December 18, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2011.
- 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.