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Expired European patentEurope

Piezoelectric ceramic and manufacturing method thereof

EP 0374378 B1 · Applicant: TAIYO YUDEN KABUSHIKI KAISHA

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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 September 15, 1989 and granted April 7, 1993. A European patent lasts at most 20 years from filing, so its term ended September 15, 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 March 15, 2015.
  • 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.
FiledSeptember 15, 1989
PublishedJune 27, 1990
GrantedApril 7, 1993
Term endedSeptember 15, 2009
Application numberEP 89117108
Classification (CPC)C04B35/497 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedSep 15, 1989PublishedJune 27, 1990Patent grantedApril 7, 1993Term endedSep 15, 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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