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Expired European patentEurope

Magnetic field generating device

EP 0284439 B1 · Applicant: SUMITOMO SPECIAL METALS CO. 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 March 28, 1988 and granted February 3, 1993. A European patent lasts at most 20 years from filing, so its term ended March 28, 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 28, 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 28, 1988
PublishedSeptember 28, 1988
GrantedFebruary 3, 1993
Term endedMarch 28, 2008
Application numberEP 88302741
Classification (CPC)H01F7/0278 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedMarch 28, 1988PublishedSep 28, 1988Patent grantedFeb 3, 1993Term endedMarch 28, 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.