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Expired European patentEurope

Determining in-situ the relation between seismic velocity and state of stress in an underground formation

EP 1761805 B1 · Applicant: Shell Internationale Research Maatschappij B.V.

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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 28, 2005 and granted May 1, 2013. A European patent lasts at most 20 years from filing, so its term ended June 28, 2025.
  • 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.
FiledJune 28, 2005
PublishedMarch 14, 2007
GrantedMay 1, 2013
Term endedJune 28, 2025
Application numberEP 05761148
Classification (CPC)G01V1/30

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedJune 28, 2005PublishedMarch 14, 2007Patent grantedMay 1, 2013Term endedJune 28, 2025

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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

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