Antiviral agent
CA 2452769 C · Owner: Fuji, Masahiro · Inventors: Kanda, Yasuhiko; Fujishita, Toshio; Tada, Yukio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an integrase inhibitor. The inventors have have found the following compound of formula (I) possessing an integrase inhibitory , activity. (see formula I) (wherein, R C and R D taken together with the neighboring carbon atoms form a ring , which may be a condensed ring, Y is hydroxy mercapto or amino; Z is O, S or , NH ; R A is a group shown by, (see formula II) (wherein, C ring is N-containing aromatic heterocycle or the like)
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 August 8, 2002 and granted August 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 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.