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Expired European patentEurope

Oligobipyridine ligands, process for obtaining them and application as complexing agents

EP 0360820 B1 · Applicant: CIS BIO INTERNATIONAL

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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 April 29, 1988 and granted August 19, 1992. A European patent lasts at most 20 years from filing, so its term ended April 29, 2008.
  • 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 October 29, 2013.
  • 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.
FiledApril 29, 1988
PublishedApril 4, 1990
GrantedAugust 19, 1992
Term endedApril 29, 2008
Application numberEP 88904231
Classification (CPC)C07D213/22 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedApril 29, 1988PublishedApril 4, 1990Patent grantedAug 19, 1992Term endedApril 29, 2008

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.