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European application, no grantEurope

System and method for controlled directional drilling

EP 0243401 A1 · Applicant: SMITH INTERNATIONAL, INC.

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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 September 23, 1986 and never granted as a European patent. Had it been granted, its 20-year term would have ended September 23, 2006.
  • 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 23, 2012.
  • 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 23, 1986
PublishedNovember 4, 1987
GrantedNever granted
Term endedSeptember 23, 2006
Application numberEP 86906146
Classification (CPC)E21B7/067 +1 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedSep 23, 1986PublishedNov 4, 1987Term endedSep 23, 2006

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.