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Expired European patentEurope

Apparatus and method for geophone sensor string placement

EP 0048317 B1 · Applicant: Energy Analysts Incorporated

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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 12, 1981 and granted March 26, 1986. A European patent lasts at most 20 years from filing, so its term ended June 12, 2001.
  • 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 12, 2006.
  • 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 12, 1981
PublishedMarch 31, 1982
GrantedMarch 26, 1986
Term endedJune 12, 2001
Application numberEP 81104536
Classification (CPC)G01V1/20

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedJune 12, 1981PublishedMarch 31, 1982Patent grantedMarch 26, 1986Term endedJune 12, 2001

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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