Process for the preparation of amidoxime derivatives
CA 2024808 A1 · Owner: Bertok, Bela · Inventors: Botar, Sandor; Thurner, Angelika; Bertok, Bela
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A b s t r a c t, The invention relates to an improved process for preparing amidoxime derivatives of the general formula (I), (I), wherein, R1 means a C2-15 group which may be unsaturated and/or, cyclic alkyl aralkyl group or optionally substituted and/or condensed aromatic and/or heteroaromatic group; R2 stands for hydrogen or an optionally substituted straight or branched chain or cyclic and/or unsaturated C1-7 alkyl or aromatic group;, R3 represents an optionally substituted straight or branched chain or cyclic and/or unsaturated C1-7 alkyl or aromatic group; or, R2 and R3 together with the adjacent nitrogen atom may form an 5- to 8-membered ring optionally containing other …
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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 January 10, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2012.
- 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.