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Expired European patentEurope

Finishing method employing electrochemical machining and an electrochemical finishing machine

EP 0324142 B1 · Applicant: SHIZUOKA SEIKI CO. 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 21, 1988 and granted March 11, 1992. A European patent lasts at most 20 years from filing, so its term ended December 21, 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 June 21, 2014.
  • 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 21, 1988
PublishedJuly 19, 1989
GrantedMarch 11, 1992
Term endedDecember 21, 2008
Application numberEP 88121394
Classification (CPC)B23H3/02

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedDec 21, 1988PublishedJuly 19, 1989Patent grantedMarch 11, 1992Term endedDec 21, 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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