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Expired European patentEurope

Surveying of boreholes

EP 0348049 B1 · Applicant: RUSSELL SUB-SURFACE SYSTEMS LIMITED

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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 May 30, 1989 and granted March 3, 1993. A European patent lasts at most 20 years from filing, so its term ended May 30, 2009.
  • 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 November 30, 2014.
  • 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.
FiledMay 30, 1989
PublishedDecember 27, 1989
GrantedMarch 3, 1993
Term endedMay 30, 2009
Application numberEP 89305414
Classification (CPC)G01V3/26

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedMay 30, 1989PublishedDec 27, 1989Patent grantedMarch 3, 1993Term endedMay 30, 2009

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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