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Expired European patentEurope

Subterranean fluids and methods of cementing in subterranean formations

EP 1751074 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 April 26, 2005 and granted March 4, 2015. A European patent lasts at most 20 years from filing, so its term ended April 26, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledApril 26, 2005
PublishedFebruary 14, 2007
GrantedMarch 4, 2015
Term endedApril 26, 2025
Application numberEP 05738091
Classification (CPC)C09K8/40 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedApril 26, 2005PublishedFeb 14, 2007Patent grantedMarch 4, 2015Term endedApril 26, 2025

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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