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Expired European patentEurope

High-pressure discharge lamp having a ceramic discharge vessel, sintered body suitable therefor, and methods for producing the said sintered body

EP 0657399 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 December 10, 1993 and granted July 16, 1997. A European patent lasts at most 20 years from filing, so its term ended December 10, 2013.
  • 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 10, 2019.
  • 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 10, 1993
PublishedJune 14, 1995
GrantedJuly 16, 1997
Term endedDecember 10, 2013
Application numberEP 93119959
Classification (CPC)C04B35/115 +1 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedDec 10, 1993PublishedJune 14, 1995Patent grantedJuly 16, 1997Term endedDec 10, 2013

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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