Cyclic amidine compounds
CA 2372673 A1 · Owner: Iwanami, Tatsuya · Inventors: Akabane, Minako; Imoto, Masahiro; Iwanami, Tatsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided cyclic amidine compounds of the following formula (I) wherein: A1 and A2 are hydrogen atom, optionally substituted alkyl group; optionally substituted aryl group; or optionally substituted heterocyclic group; and X is -C(R1,R2)-C(R3,R4)-, -C(R5)=C(R6)- -C(R7,R8)-C(R9,R10)-, C(R11,R12)-, or -C(R13,R14)-C(R15,R16)-NH- (wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10 R11R12, R13, R14, R15 and R16 are hydrogen atom; halogen atom; optionally substituted alkyl group; optionally substituted aryl group; or optionally substituted heterocyclic group;or pharmaceutically acceptable salts thereof. These compounds have good affinity for .alpha.4.beta.2 nicotinic acetylcholine …
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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 April 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2023.
- 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.