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Expired European patentEurope

Cementing casing strings in deep water offshore wells

EP 1069091 B1 · Applicant: Halliburton Energy Services, Inc.

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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 July 14, 2000 and granted January 29, 2003. A European patent lasts at most 20 years from filing, so its term ended July 14, 2020.
  • 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 14, 2026.
  • 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 14, 2000
PublishedJanuary 17, 2001
GrantedJanuary 29, 2003
Term endedJuly 14, 2020
Application numberEP 00305989
Classification (CPC)C09K8/46 +2 more

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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