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Expired European patentEurope

Electro-discharge machining apparatus

EP 0371962 B1 · Applicant: SPARK TEC (EUROPE) LIMITED

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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 March 10, 1988 and granted May 19, 1993. A European patent lasts at most 20 years from filing, so its term ended March 10, 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 September 10, 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.
FiledMarch 10, 1988
PublishedJune 6, 1990
GrantedMay 19, 1993
Term endedMarch 10, 2008
Application numberEP 90101481
Classification (CPC)B23H9/04 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedMarch 10, 1988PublishedJune 6, 1990Patent grantedMay 19, 1993Term endedMarch 10, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.