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Expired European patentEurope

Method for recovering at least one metal from an acidified waste water sludge

EP 0715604 B1 · Applicant: KEMIRA OY

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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 August 26, 1994 and granted December 16, 1998. A European patent lasts at most 20 years from filing, so its term ended August 26, 2014.
  • 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 26, 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.
FiledAugust 26, 1994
PublishedJune 12, 1996
GrantedDecember 16, 1998
Term endedAugust 26, 2014
Application numberEP 94924900
Classification (CPC)C02F1/26 +1 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedAug 26, 1994PublishedJune 12, 1996Patent grantedDec 16, 1998Term endedAug 26, 2014

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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