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Expired European patentEurope

Method of making a bimetallic central electrode with a platinum tip for a sparking plug, and electrode obtained by this method

EP 0262005 B1 · Applicant: EYQUEM, Société dite:

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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 12, 1987 and granted June 6, 1990. A European patent lasts at most 20 years from filing, so its term ended August 12, 2007.
  • 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 12, 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.
FiledAugust 12, 1987
PublishedMarch 30, 1988
GrantedJune 6, 1990
Term endedAugust 12, 2007
Application numberEP 87401875
Classification (CPC)H01T21/02

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedAug 12, 1987PublishedMarch 30, 1988Patent grantedJune 6, 1990Term endedAug 12, 2007

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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