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Expired European patentEurope

Method of producing a substrate comprising a polarization domain reversal structure and substrate comprising such a polarization domain reversal structure

EP 1801644 B1 · Applicant: NGK Insulators, 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 October 11, 2005 and granted December 11, 2013. A European patent lasts at most 20 years from filing, so its term ended October 11, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledOctober 11, 2005
PublishedJune 27, 2007
GrantedDecember 11, 2013
Term endedOctober 11, 2025
Application numberEP 05793453
Classification (CPC)G02F1/3558

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedOct 11, 2005PublishedJune 27, 2007Patent grantedDec 11, 2013Term endedOct 11, 2025

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

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