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Expired European patentEurope

Process for producing grainoriented electrical steel sheet having superior magnetic and surface film characteristics

EP 0400549 B1 · Applicant: NIPPON STEEL CORPORATION

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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 May 28, 1990 and granted September 27, 1995. A European patent lasts at most 20 years from filing, so its term ended May 28, 2010.
  • 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 November 28, 2015.
  • 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.
FiledMay 28, 1990
PublishedDecember 5, 1990
GrantedSeptember 27, 1995
Term endedMay 28, 2010
Application numberEP 90110108
Classification (CPC)C21D3/04 +1 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMay 28, 1990PublishedDec 5, 1990Patent grantedSep 27, 1995Term endedMay 28, 2010

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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