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Expired European patentEurope

A drilling machine to be coupled to an excavator

EP 0187736 B1 · Applicant: Sonerud, John Teodor

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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 30, 1983 and granted May 4, 1988. A European patent lasts at most 20 years from filing, so its term ended September 30, 2003.
  • 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 30, 2009.
  • 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 30, 1983
PublishedJuly 23, 1986
GrantedMay 4, 1988
Term endedSeptember 30, 2003
Application numberEP 83903121
Classification (CPC)E21B15/006 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedSep 30, 1983PublishedJuly 23, 1986Patent grantedMay 4, 1988Term endedSep 30, 2003

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.