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Expired European patentEurope

Thin film waveguide path and manufacturing method therefor

EP 0194639 B1 · Applicant: Kuraray Co., Ltd.

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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 March 11, 1986 and granted July 29, 1992. A European patent lasts at most 20 years from filing, so its term ended March 11, 2006.
  • 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 11, 2011.
  • 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 11, 1986
PublishedSeptember 17, 1986
GrantedJuly 29, 1992
Term endedMarch 11, 2006
Application numberEP 86103218
Classification (CPC)B32B7/023 +1 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMarch 11, 1986PublishedSep 17, 1986Patent grantedJuly 29, 1992Term endedMarch 11, 2006

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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