Patent Yard Sign in
Expired European patentEurope

Down hole testing apparatus with television

EP 0753647 B1 · Applicant: DORYOKURO KAKUNENRYO KAIHATSU JIGYODAN

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed July 10, 1996 and granted December 15, 2004. A European patent lasts at most 20 years from filing, so its term ended July 10, 2016.
  • 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 January 10, 2022.
  • 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.
FiledJuly 10, 1996
PublishedJanuary 15, 1997
GrantedDecember 15, 2004
Term endedJuly 10, 2016
Application numberEP 96401525
Classification (CPC)E21B47/002 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedJuly 10, 1996PublishedJan 15, 1997Patent grantedDec 15, 2004Term endedJuly 10, 2016

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.