Carbapenem derivatives
CA 2315056 A1 · Owner: Mitsuya, Aya · Inventors: Nakano, Masato; Ushijima, Ryosuke; Sakuraba, Shunji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds represented by general formula (I); a process for producing the same; and utilization thereof as antimicrobial agents and metallo-.beta.lactamase inhibitors, wherein R1 represents hydrogen or lower alkyl; R2 represents hydrogen, an ester residue, etc.; R3 and R4 are the same or different and each represents hydrogen halogeno, etc.; R5 and R6 are the same or different and each represents hydrogen lower alkoxy, etc. or lower alkyl , optionally having one or two substituents selected from the group consisting of carbamoyl, carboxy and hydroxy; group (a) represents aryl selected from the group consisting of benzene and naphthalene rings etc.; and Y represents a , single bond …
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 December 16, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2020.
- 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.