Polymorphs of the prodrug 6-n-(l-ala-l-ala)-trovafloxacin
CA 2230303 C · Owner: Allen, Douglas J. M. · Inventors: Mcgarry, James J.; Norris, Timothy; Allen, Douglas J. M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A prodrug of trovafloxacin having formula (I) which is selected from its , polymorph PII and the monohydrate PII.M and pseudomorphs PII.PS thereof and , processes for their preparation. Polymorph PII and the monohydrate PII.M and pseudomorph PII.PS thereof are described in said formula. The invention further relates to methods of using, and pharmaceutical compositions comprising, the compounds of the invention for treatment of bacterial infections in mammals.
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 July 5, 1996 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 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.