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Expired European patentEurope

Downhole signal communication and measurement through a metal tubular

EP 1158138 B1 · Applicant: SERVICES PETROLIERS SCHLUMBERGER

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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 May 15, 2001 and granted December 9, 2009. A European patent lasts at most 20 years from filing, so its term ended May 15, 2021.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledMay 15, 2001
PublishedNovember 28, 2001
GrantedDecember 9, 2009
Term endedMay 15, 2021
Application numberEP 01201810
Classification (CPC)G01V11/002 +2 more

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedMay 15, 2001PublishedNov 28, 2001Patent grantedDec 9, 2009Term endedMay 15, 2021

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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