Derivatives of saturated nitrogen heterocycles
CA 2089533 A1 · Owner: Stanek, Jaroslav · Inventors: Frei, Jorg; Stanek, Jaroslav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4-18973/A, Derivatives of saturated nitrogen heterocycles Abstract of the Disclosure, The invention relates to compound of formula I (I), wherein either R1 is a radical of formula Ia -(CH2)n-O-NH2 (Ia), in which n is 0 or 1 and R2 is hydrogen, or R1 is hydrogen and R2 is a radical of formula Ib, -(CH2)p-O-NH2 (Ib), in which p is 1 or 2 and wherein R is C1-C2alkyl which is attached to one carbon atom of the central piperidine ring system, but not to the same carbon atom as R1 of formula Ia or as R2 of formula Ib; and m is 1 or 2, and salts thereof. The invention further relates to the preparation of these compounds, to intermediates obtained during their synthesis to, pharmaceutical …
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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 February 15, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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.