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Expired European patentEurope

Work-over device for non eruptive deviated wells

EP 0484218 B1 · Applicant: INSTITUT FRANCAIS DU PETROLE

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Overview

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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 October 25, 1991 and granted April 12, 1995. A European patent lasts at most 20 years from filing, so its term ended October 25, 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 April 25, 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.
FiledOctober 25, 1991
PublishedMay 6, 1992
GrantedApril 12, 1995
Term endedOctober 25, 2011
Application numberEP 91402874
Classification (CPC)E21B23/08 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedOct 25, 1991PublishedMay 6, 1992Patent grantedApril 12, 1995Term endedOct 25, 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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