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Expired European patentEurope

Light modulation element

EP 0332456 B1 · Applicant: MITSUI PETROCHEMICAL INDUSTRIES, 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 10, 1989 and granted September 20, 1995. A European patent lasts at most 20 years from filing, so its term ended March 10, 2009.
  • 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 10, 2014.
  • 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 10, 1989
PublishedSeptember 13, 1989
GrantedSeptember 20, 1995
Term endedMarch 10, 2009
Application numberEP 89302379
Classification (CPC)C09K19/322 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedMarch 10, 1989PublishedSep 13, 1989Patent grantedSep 20, 1995Term endedMarch 10, 2009

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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