Optical isomers of 7-¬3-(1,1-dialkylmethyl-1-amino)-1-pyrrolidinyl -quinolones and naphthyridones as antibacterial agents
CA 2095361 C · Owner: Warner-Lambert Company · Inventors: Hagen, Susan Elizabeth; Suto, Mark James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optically pure isomers of the following formula (see formula I), which are 7-3-(1,1-dialkylmethyl-1-amino)-1pyrrolidinylquinolones and naphthyridones as therapeutically active and safe antibacterial agents are described, as well as pharmaceutical compositions thereof, and a method of treating bacterial infections therewith. Also described is a method of manufacture of the quinolones and naphthyridones as well as the starting materials, the optically pure pyrrolidine moieties for attachment at the 7-position.
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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 November 12, 1991 and granted October 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2013.
- 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.