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Expired European patentEurope

Erbium-doped planar waveguide

EP 0867985 B1 · Applicant: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO

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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 March 27, 1997 and granted February 14, 2001. A European patent lasts at most 20 years from filing, so its term ended March 27, 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 September 27, 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.
FiledMarch 27, 1997
PublishedSeptember 30, 1998
GrantedFebruary 14, 2001
Term endedMarch 27, 2017
Application numberEP 97200930
Classification (CPC)C03C4/0071 +2 more

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedMarch 27, 1997PublishedSep 30, 1998Patent grantedFeb 14, 2001Term endedMarch 27, 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

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