Antibiotic compounds
CA 2106370 C · Owner: Astrazeneca Sa · Inventors: Betts, Michael J.; Davies, Gareth M.; Swain, Michael L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to carbapenems and provides a compound of formula (I) or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof wherein: R1 is 1-hydroxyethyl 1-, fluoroethyl or hydroxymethyl; R2 is hydrogen or C1-4alkyl; R3 is hydrogen or C1-4alkyl; R4 and R5 are the same or different and are selected from hydrogen, halo, cyano C1-4alkyl, nitro, hydroxy, carboxy, C1-4alkoxy C1-4alkoxycarbonyl, aminosulphonyl, C1-4alkylaminosulphonyl di-C1-4alky-, laminosulphonyl, carbamoyl C1-4alkylcarbamoyl, di-C1-4alkylcarbamoyl trifluoromethyl, sulphonic acid, amino C1-4alky-, laxnino, di-C1-4alkylamino, C1-4alkanoylamino C1-4alkanoyl(N C1-4alkyl)amino, …
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 2, 1993 and granted November 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2015.
- 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.