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Expired European patentEurope

A fluorophosphate fluorescent glass capable of exhibiting fluorescence in the visible region

EP 0775673 B1 · Applicant: SUMITA OPTICAL GLASS, INC.

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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 November 20, 1996 and granted January 20, 1999. A European patent lasts at most 20 years from filing, so its term ended November 20, 2016.
  • 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 May 20, 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.
FiledNovember 20, 1996
PublishedMay 28, 1997
GrantedJanuary 20, 1999
Term endedNovember 20, 2016
Application numberEP 96308394
Classification (CPC)C03C4/12 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedNov 20, 1996PublishedMay 28, 1997Patent grantedJan 20, 1999Term endedNov 20, 2016

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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