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Expired European patentEurope

1-Cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-(alkyl-1-piperazinyl)-3-quinoline-carboxylic acids, process for their preparation and antibacterial agents containing them

EP 0113093 B1 · Applicant: BAYER AG

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Overview

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed December 17, 1983 and granted May 21, 1986. A European patent lasts at most 20 years from filing, so its term ended December 17, 2003.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by June 17, 2009.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledDecember 17, 1983
PublishedJuly 11, 1984
GrantedMay 21, 1986
Term endedDecember 17, 2003
Application numberEP 83112725
Classification (CPC)A61P31/04 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedDec 17, 1983PublishedJuly 11, 1984Patent grantedMay 21, 1986Term endedDec 17, 2003

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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