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Expired European patentEurope

Isotropic magnets and process for producing same

EP 0125347 B1 · Applicant: SUMITOMO SPECIAL METALS 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 30, 1983 and granted April 18, 1990. A European patent lasts at most 20 years from filing, so its term ended December 30, 2003.
  • 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 30, 2009.
  • 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 30, 1983
PublishedNovember 21, 1984
GrantedApril 18, 1990
Term endedDecember 30, 2003
Application numberEP 83113253
Classification (CPC)H01F1/0577

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedDec 30, 1983PublishedNov 21, 1984Patent grantedApril 18, 1990Term endedDec 30, 2003

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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