Quinolones and their therapeutic use
CA 2241891 A1 · Owner: Montana, John Gary · Inventors: Haughan, Alan Findlay; Beasley, Steven Colin; Watson, Robert John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of formula (I) wherein n is an integer of up to 3; R1 represents cycloalkyl, aryl, heteroaryl or heterocyclo any of which rings may be fused , to a second ring selected from aryl heteroaryl, to give a bicyclic structure and in which the or each ring is optionally substituted by one or more substituents chosen from halo, C1-6 alkoxy hydroxy, CN, CO2H (or C1-6 alkyl , esters or C1-6 alkyl amides thereof) C1-6 alkyl, NR6 R7 and SO2NR6R7; R3, R4 and R5 are the same or different and represent H halo, C1-6 alkoxy, hydroxy, CN, CO2H (or C1-6 alkyl esters or C1-6 alkyl amides thereof) NR6R7, SO2NR6R7 , or C1-6 alkyl in which alkyl is optionally substituted with halo C1-6 alkoxy, …
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 February 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2019.
- 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.