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Expired European patentEurope

Ceramic base and process for its production

EP 0309593 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 April 16, 1988 and granted March 10, 1993. A European patent lasts at most 20 years from filing, so its term ended April 16, 2008.
  • 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 October 16, 2013.
  • 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.
FiledApril 16, 1988
PublishedApril 5, 1989
GrantedMarch 10, 1993
Term endedApril 16, 2008
Application numberEP 88903382
Classification (CPC)C04B41/009 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedApril 16, 1988PublishedApril 5, 1989Patent grantedMarch 10, 1993Term endedApril 16, 2008

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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