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Expired European patentEurope

Benzophenoxazine dyes

EP 0885263 B1 · Applicant: Amersham Pharmacia Biotech UK Limited

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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 February 5, 1997 and granted April 25, 2001. A European patent lasts at most 20 years from filing, so its term ended February 5, 2017.
  • 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 August 5, 2022.
  • 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.
FiledFebruary 5, 1997
PublishedDecember 23, 1998
GrantedApril 25, 2001
Term endedFebruary 5, 2017
Application numberEP 97902477
Classification (CPC)C07D265/34 +2 more

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedFeb 5, 1997PublishedDec 23, 1998Patent grantedApril 25, 2001Term endedFeb 5, 2017

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.