Novel quaternary salt-type carbapenem derivatives
CA 2398478 A1 · Owner: Maruyama, Takahisa · Inventors: Atsumi, Kunio; Ida, Takashi; Maruyama, Takahisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carbapenem derivatives having potent antimicrobial activities on MRSA PRSP, influenza viruses and .beta.-lactamase-producing bacteria and a high stability to DHP-1. Namely, compounds represented by the general formula (I) or pharmaceutically acceptable salts thereof wherein R1 represents H or methyl; , R2 and R3 represent each H halogeno, lower alkyl, etc.; R4 represents optionally substituted lower alkylthio etc.; and R5 represents optionally , substituted lower alkyl etc.
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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 January 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 26, 2023.
- 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.