Cephalosporin derivatives
CA 1267647 C · Owner: Nakano, Fumio · Inventors: Nakagawa, Susumu; Ushijima, Ryosuke; Yamada, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound having the formula: ( I ), wherein R1 is a straight chain, branched chain or cyclic lower alkyl group which may be substituted by a carboxyl group and, each of R2 and R3 which may be the same or different is a, hydrogen atom, a hydroxyl group, a methoxy group or an acetoxy group, and R4 is a hydroxyl group, a methoxy sroup or an acetoxy group; or a pharmaceutically acceptable salt physiologically, hydrolyzable ester or solvate thereof. The compounds of the present invention exhibit superior antibacterial activities against sensitive strains of these bacteria as compared with Ceftazidime, and also exhibit excellent antibacterial activities against Ceftazidime-resistant Pseudomonas …
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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
- Granted April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.