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Expired European patentEurope

Methods for controlling fluid loss

EP 1789650 B1 · Applicant: Services Pétroliers Schlumberger

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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 August 24, 2005 and granted November 26, 2008. A European patent lasts at most 20 years from filing, so its term ended August 24, 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.
FiledAugust 24, 2005
PublishedMay 30, 2007
GrantedNovember 26, 2008
Term endedAugust 24, 2025
Application numberEP 05781265
Classification (CPC)C09K8/72 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedAug 24, 2005PublishedMay 30, 2007Patent grantedNov 26, 2008Term endedAug 24, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.