Heterocyclic compounds and medical use thereof
CA 2377771 A1 · Owner: Yamamoto, Takashi · Inventors: Konishi, Atsushi; Fujita, Kohichi; Takehana, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Heterocyclic compounds represented by the following general formula which have inhibitory effects on AP-1 activity, NF-Kappa B activity inflammatory , cytokine production, matrix metalloprotease production inflammatory cell , adhesion factor expression etc. and are usable as drugs: R1-C(=O)-N(R2)-A-X-B- N(R3)-Y-(CH2)n-R4 wherein R1 represents cycloalkyl or cycloalkenyl; R2 and R3 represent each hydrogen or alkyl; R4 represents alkyl a heterocycle, etc.; n , is an integer of from 0 to 6; A represents a heterocycle; B represents an aromatic ring or a heterocycle; and X and Y represent each a bond or a linking group.
Read the whole patent
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 June 29, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 29, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2022.
- 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.