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Expired European patentEurope

Method of preparing oxide superconducting wire

EP 0467237 B1 · Applicant: SUMITOMO ELECTRIC INDUSTRIES, LIMITED

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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 12, 1991 and granted October 22, 1997. A European patent lasts at most 20 years from filing, so its term ended July 12, 2011.
  • 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 12, 2017.
  • 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 12, 1991
PublishedJanuary 22, 1992
GrantedOctober 22, 1997
Term endedJuly 12, 2011
Application numberEP 91111684
Classification (CPC)H10N60/0801

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJuly 12, 1991PublishedJan 22, 1992Patent grantedOct 22, 1997Term endedJuly 12, 2011

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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