Novel pyridonecarboxylic acid derivatives or their salts, and antibacterial agents containing the same as their effective components
CA 2290712 C · Owner: Niino, Yoshiko · Inventors: Amano, Hirotaka; Hirao, Yuzo; Niino, Yoshiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is the compound 1-(6-amino-3,5-difluoropyridin- 2-yl)-8-chloro-6-fluoro-7-(3-hydroxyazetidin-1-yl)-4-oxo-1,4- dihydroquinoline-3-carboxylic acid represented by the following formula: (see above formula) or a salt thereof. The compound or salt is useful as an anti-bacterial agent.
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 September 20, 1996 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2018.
- 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.