Fused cyclic compounds and medicinal use thereof
CA 2423800 A1 · Owner: Japan Tobacco Inc. · Inventors: Yoshida, Atsuhito; Hashimoto, Hiromasa; Mizutani, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fused cyclic compounds represented by the following general formula I or pharmaceutically acceptable salts thereof and remedies for hepatitis C containing these compounds: I wherein each symbol is as defined in the description. Because of having an effect against hepatitis C virus (HVC) based on an HCV polymerase inhibitory effect these compounds are useful as remedies or preventives for hepatitis C.
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 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2024.
- 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.