Pyridonecarboxylic acid derivatives and process for their preparation
CA 1262349 C · Owner: Suzue, Seigo · Inventors: Masuzawa, Kuniyoshi; Suzue, Seigo; Ishizaki, Takayoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title of the invention:, Pyridonecarboxylic acid derivatives and process for their preparation, Abstract of the invention: Pyridonecarboxylic acid derivatives of the following formula, wherein R is hydrogen atom or lower alkyl group R1 is lower, alkyl group, cycloalkyl group or haloalkyl group Y is hydrogen, atom or halogen atom, or Y and Rl are which work, together, R2 is hydrogen atom lower alkyl group, alkoxycarbonyl, group or acyl group and n is 0 or 1; the hydrates and pharmaceutically acceptable salts thereof are useful as antibacterial agents.
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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 October 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 17, 2006.
- 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.