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Optical fibre multiplexer/demultiplexer having a reflection layer outside of an optical coupling portion

EP 0683408 A1 · Applicant: SEIKOH GIKEN Co., Ltd.

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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 30, 1995 and never granted as a European patent. Had it been granted, its 20-year term would have ended March 30, 2015.
  • 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 30, 2020.
  • 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 30, 1995
PublishedNovember 22, 1995
GrantedNever granted
Term endedMarch 30, 2015
Application numberEP 95104701
Classification (CPC)G02B6/2835

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedMarch 30, 1995PublishedNov 22, 1995Term endedMarch 30, 2015

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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