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Expired European patentEurope

Dielectric ceramic composition of BaO, TiO2, Nd2O3, Sm2O3 and Bi2O3

EP 0473347 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 August 19, 1991 and granted November 6, 1996. A European patent lasts at most 20 years from filing, so its term ended August 19, 2011.
  • 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 February 19, 2017.
  • 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 19, 1991
PublishedMarch 4, 1992
GrantedNovember 6, 1996
Term endedAugust 19, 2011
Application numberEP 91307627
Classification (CPC)H01B3/12 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedAug 19, 1991PublishedMarch 4, 1992Patent grantedNov 6, 1996Term endedAug 19, 2011

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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