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Expired European patentEurope

Vibrating hole forming device for seismic exploration

EP 0664011 B1 · Applicant: Schlumberger Seismic Holdings Limited

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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 13, 1993 and granted March 10, 1999. A European patent lasts at most 20 years from filing, so its term ended October 13, 2013.
  • 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 13, 2019.
  • 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 13, 1993
PublishedJuly 26, 1995
GrantedMarch 10, 1999
Term endedOctober 13, 2013
Application numberEP 93923303
Classification (CPC)E21B7/24

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedOct 13, 1993PublishedJuly 26, 1995Patent grantedMarch 10, 1999Term endedOct 13, 2013

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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