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Expired European patentEurope

Method and apparatus for monitoring well fluid parameters

EP 0465543 B1 · Applicant: PHOENIX PETROLEUM SERVICES LTD.

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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 March 30, 1990 and granted June 28, 1995. A European patent lasts at most 20 years from filing, so its term ended March 30, 2010.
  • 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 September 30, 2015.
  • 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.
FiledMarch 30, 1990
PublishedJanuary 15, 1992
GrantedJune 28, 1995
Term endedMarch 30, 2010
Application numberEP 90905587
Classification (CPC)E21B47/06 +1 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMarch 30, 1990PublishedJan 15, 1992Patent grantedJune 28, 1995Term endedMarch 30, 2010

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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