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Expired European patentEurope

Variable output rotary power generator

EP 1055282 B1 · Applicant: HALLIBURTON ENERGY SERVICES, INC.

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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 January 16, 1999 and granted September 5, 2012. A European patent lasts at most 20 years from filing, so its term ended January 16, 2019.
  • 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 July 16, 2024.
  • 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.
FiledJanuary 16, 1999
PublishedNovember 29, 2000
GrantedSeptember 5, 2012
Term endedJanuary 16, 2019
Application numberEP 99904113
Classification (CPC)E21B41/0085 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedJan 16, 1999PublishedNov 29, 2000Patent grantedSep 5, 2012Term endedJan 16, 2019

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.