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Expired European patentEurope

Process of manufacturing superconductors and therewith obtained products

EP 0309323 B1 · Applicant: RHONE-POULENC CHIMIE

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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 September 16, 1988 and granted January 20, 1993. A European patent lasts at most 20 years from filing, so its term ended September 16, 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 March 16, 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.
FiledSeptember 16, 1988
PublishedMarch 29, 1989
GrantedJanuary 20, 1993
Term endedSeptember 16, 2008
Application numberEP 88402335
Classification (CPC)C01G49/009 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedSep 16, 1988PublishedMarch 29, 1989Patent grantedJan 20, 1993Term endedSep 16, 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

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