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Expired European patentEurope

Device and method for real-time monitoring of accidental damage to the protective covering of underground or immersed metal structures or pipelines

EP 0495259 B1 · Applicant: ENIRICERCHE S.p.A.

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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 November 28, 1991 and granted April 27, 1994. A European patent lasts at most 20 years from filing, so its term ended November 28, 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 May 28, 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.
FiledNovember 28, 1991
PublishedJuly 22, 1992
GrantedApril 27, 1994
Term endedNovember 28, 2011
Application numberEP 91203119
Classification (CPC)C23F13/04 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedNov 28, 1991PublishedJuly 22, 1992Patent grantedApril 27, 1994Term endedNov 28, 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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