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Expired European patentEurope

Downhole tool for determination of formation properties

EP 0697502 B1 · Applicant: SCHLUMBERGER LIMITED

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 14, 1989 and granted May 3, 2000. A European patent lasts at most 20 years from filing, so its term ended September 14, 2009.
  • 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 14, 2015.
  • 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 14, 1989
PublishedFebruary 21, 1996
GrantedMay 3, 2000
Term endedSeptember 14, 2009
Application numberEP 95115286
Classification (CPC)E21B49/081 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedSep 14, 1989PublishedFeb 21, 1996Patent grantedMay 3, 2000Term endedSep 14, 2009

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.