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Expired European patentEurope

Polarizing film containing an anthraquinonic colorant

EP 0300770 B1 · Applicant: MITSUI TOATSU CHEMICALS, 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 July 20, 1988 and granted October 19, 1994. A European patent lasts at most 20 years from filing, so its term ended July 20, 2008.
  • 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 January 20, 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.
FiledJuly 20, 1988
PublishedJanuary 25, 1989
GrantedOctober 19, 1994
Term endedJuly 20, 2008
Application numberEP 88306669
Classification (CPC)C09B1/005 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJuly 20, 1988PublishedJan 25, 1989Patent grantedOct 19, 1994Term endedJuly 20, 2008

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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