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Expired European patentEurope

Installation for the localization of interruptions and short circuits in a two-wire line

EP 0056545 B1 · Applicant: Landrea, Denis

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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 17, 1981 and granted July 4, 1984. A European patent lasts at most 20 years from filing, so its term ended December 17, 2001.
  • 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 17, 2007.
  • 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 17, 1981
PublishedJuly 28, 1982
GrantedJuly 4, 1984
Term endedDecember 17, 2001
Application numberEP 81402024
Classification (CPC)H04M3/301

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedDec 17, 1981PublishedJuly 28, 1982Patent grantedJuly 4, 1984Term endedDec 17, 2001

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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