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Expired European patentEurope

Directional drilling methods and apparatus

EP 0686752 B1 · Applicant: SERVICES PETROLIERS SCHLUMBERGER

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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 June 6, 1995 and granted May 10, 2000. A European patent lasts at most 20 years from filing, so its term ended June 6, 2015.
  • 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 December 6, 2020.
  • 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.
FiledJune 6, 1995
PublishedDecember 13, 1995
GrantedMay 10, 2000
Term endedJune 6, 2015
Application numberEP 95303887
Classification (CPC)E21B44/00 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedJune 6, 1995PublishedDec 13, 1995Patent grantedMay 10, 2000Term endedJune 6, 2015

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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