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Expired European patentEurope

Oil well safety valve and tool for installing such a valve

EP 0321609 B1 · Applicant: MERIP OIL TOOLS INTERNATIONAL Société Anonyme

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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 December 22, 1987 and granted April 29, 1992. A European patent lasts at most 20 years from filing, so its term ended December 22, 2007.
  • 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 June 22, 2013.
  • 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.
FiledDecember 22, 1987
PublishedJune 28, 1989
GrantedApril 29, 1992
Term endedDecember 22, 2007
Application numberEP 87202599
Classification (CPC)E21B34/105

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedDec 22, 1987PublishedJune 28, 1989Patent grantedApril 29, 1992Term endedDec 22, 2007

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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