N-aminocarbamates related to physostigmine, a process for their preparation and their use as medicaments
CA 2026381 A1 · Owner: Glamkowski, Edward J. · Inventors: Glamkowski, Edward J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1 -, HOE 89/S 029, ABSTRACT, N-Aminocarbamates Related to Physostigmine a process, for their preparation and their use as medicaments The present invention relates to compounds of the formula I, (I), where X is hydrogen, halogen or loweralkyl; and R1 R2 and, R3 are each independently hydrogen loweralkyl, cycloalkyl, arylloweralkyl or aryl or alternatively the, group -NR2R3 taken as a whole constitutes , or , R4 being, hydrogen or loweralkyl and a process for their preparation. The compounds of the invention show central cholinergic innervative properties for treating various memory dysfunctions and can therefore, be used as medicaments.
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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 September 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 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
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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.