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Expired European patentEurope

Terahertz electromagnetic wave radiation element and its manufacturing method

EP 1804347 B1 · Applicant: National University Corporation Hokkaido University

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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 August 23, 2005 and granted January 1, 2014. A European patent lasts at most 20 years from filing, so its term ended August 23, 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.
FiledAugust 23, 2005
PublishedJuly 4, 2007
GrantedJanuary 1, 2014
Term endedAugust 23, 2025
Application numberEP 05774908
Classification (CPC)H10F77/20 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedAug 23, 2005PublishedJuly 4, 2007Patent grantedJan 1, 2014Term endedAug 23, 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

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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