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Expired European patentEurope

Roller breakage detector for roller hearth kilns

EP 0556519 B1 · Applicant: NGK INSULATORS, LTD.

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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 December 23, 1992 and granted July 10, 1996. A European patent lasts at most 20 years from filing, so its term ended December 23, 2012.
  • 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 June 23, 2018.
  • 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.
FiledDecember 23, 1992
PublishedAugust 25, 1993
GrantedJuly 10, 1996
Term endedDecember 23, 2012
Application numberEP 92311740
Classification (CPC)F27D21/04 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedDec 23, 1992PublishedAug 25, 1993Patent grantedJuly 10, 1996Term endedDec 23, 2012

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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