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Expired European patentEurope

Method for removing alkaline sulfate scale

EP 0772696 B1 · Applicant: MOBIL 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 July 21, 1995 and granted January 26, 2000. A European patent lasts at most 20 years from filing, so its term ended July 21, 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 January 21, 2021.
  • 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.
FiledJuly 21, 1995
PublishedMay 14, 1997
GrantedJanuary 26, 2000
Term endedJuly 21, 2015
Application numberEP 95928103
Classification (CPC)B01F21/00 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedJuly 21, 1995PublishedMay 14, 1997Patent grantedJan 26, 2000Term endedJuly 21, 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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