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Expired European patentEurope

Transducer for measuring downhole pressure

EP 0528692 B1 · Applicant: HALLIBURTON COMPANY

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 20, 1992 and granted June 12, 1996. A European patent lasts at most 20 years from filing, so its term ended August 20, 2012.
  • 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 February 20, 2018.
  • 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 20, 1992
PublishedFebruary 24, 1993
GrantedJune 12, 1996
Term endedAugust 20, 2012
Application numberEP 92307602
Classification (CPC)E21B47/06 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedAug 20, 1992PublishedFeb 24, 1993Patent grantedJune 12, 1996Term endedAug 20, 2012

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.