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Expired European patentEurope

An electromagnet

EP 0300407 B1 · Applicant: OSAKA GAS CO., LTD

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 July 18, 1988 and granted March 10, 1993. A European patent lasts at most 20 years from filing, so its term ended July 18, 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 January 18, 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.
FiledJuly 18, 1988
PublishedJanuary 25, 1989
GrantedMarch 10, 1993
Term endedJuly 18, 2008
Application numberEP 88111524
Classification (CPC)H01F7/13 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJuly 18, 1988PublishedJan 25, 1989Patent grantedMarch 10, 1993Term endedJuly 18, 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.