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Expired European patentEurope

Method for removing alkaline earth metal scale

EP 0764061 B1 · Applicant: EXXONMOBIL OIL CORPORATION

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Overview

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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 January 13, 1995 and granted April 2, 2003. A European patent lasts at most 20 years from filing, so its term ended January 13, 2015.
  • 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 July 13, 2020.
  • 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.
FiledJanuary 13, 1995
PublishedMarch 26, 1997
GrantedApril 2, 2003
Term endedJanuary 13, 2015
Application numberEP 95908050
Classification (CPC)E21B37/00 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedJan 13, 1995PublishedMarch 26, 1997Patent grantedApril 2, 2003Term endedJan 13, 2015

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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