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Expired Canadian patentCanada

Naphthyridine- and quinolonecarboxylic acids as antibacterial agents

CA 1289956 C · Owner: Culbertson, Townley P. · Inventors: Domagala, John M.; Nichols, Jeffrey B.; Mich, Thomas F.

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Overview

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Abstract From the Canadian patent

Novel naphthyridine-, quinoline- and benzoxazinecarboxylic acids as antibacterial agents are described as well as methods for their manufacture formulation, and use in treating bacterial infections including the description of certain novel intermediates used in the manufacture of the 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 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 4, 1985
GrantedOctober 1, 1991
Term endedOctober 1, 2008
Patent numberCA 1289956 C
Classification (IPC)C07D401/04 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedFeb 4, 1985Patent grantedOct 1, 1991Term endedOct 1, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.