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Expired European patentEurope

Divergent nozzle for drilling tool and tool using this nozzle

EP 0533550 B1 · Applicant: TOTAL Société anonyme dite :

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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 September 15, 1992 and granted October 28, 1998. A European patent lasts at most 20 years from filing, so its term ended September 15, 2012.
  • 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 March 15, 2018.
  • 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.
FiledSeptember 15, 1992
PublishedMarch 24, 1993
GrantedOctober 28, 1998
Term endedSeptember 15, 2012
Application numberEP 92402518
Classification (CPC)E21B41/0078 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedSep 15, 1992PublishedMarch 24, 1993Patent grantedOct 28, 1998Term endedSep 15, 2012

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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