Sulfate of quinolonecarboxylic acid derivatives and the use thereof
CA 2399516 A1 · Owner: Kyorin Pharmaceutical Co. Ltd. · Inventors: Koike, Tomomi; Aizawa, Yasuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a novel sulfate salt and a hydrate thereof which are , useful in efficient recovery of 1-cyclopropyl-7-(3-methyl-1-piperazinyl)-6fluoro-8-methoxy-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid. Specifically the invention provides a sulfate salt of 1-cyclopropyl-7-(3-methyl-1piperazinyl)-6-fluoro-8-methoxy-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and a hydrate of the salt, and industrial use of both.
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 January 30, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 30, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 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.