Preparation of unsaturated amines
CA 2105100 A1 · Owner: Basf Aktiengesellschaft · Inventors: Fuchs, Eberhard; Merger, Franz; Witzel, Tom
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
a process for preparing unsaturated amines of the general formula I (I), where, R1,R2,R3,R4,R5 are hydrogen C1- to C20-alkyl, C2- to, C20-a1kenY1, C3- to C8-cycloalkyl C3- to, C8-cycloalkenyl, phe~nyl, C7- to C20-phenylalkyl, C1- to C20-alkoxy, phenoxy, C7- to C20-phenoxyalkyl, C1- to C20-alkylamino phenylamino, C7- to C20-phenylalkylamino pyridyl or imidazolyl, or R1 and R2 or R1 and R3 or R2 and R3 together are a C2- to C8-alkylene which is unsubtituted or, monosubstituted to pentasubstituted by C1to C4-alkyl or unsubstituted or monosubstituted to tetrasubstituted by amino, N-C1- to C8-alkylamino N,N-C1- to C8-di-, alkylamino, hydroxyl O-C1- to C8-alkyl-, amino and/or C1- to …
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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
- Filed August 30, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2015.
- 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.