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Expired European patentEurope

Process for purifying reduction gases

EP 1020419 B1 · Applicant: Metallgesellschaft Aktiengesellschaft

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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 November 2, 1999 and granted August 27, 2003. A European patent lasts at most 20 years from filing, so its term ended November 2, 2019.
  • 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 May 2, 2025.
  • 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.
FiledNovember 2, 1999
PublishedJuly 19, 2000
GrantedAugust 27, 2003
Term endedNovember 2, 2019
Application numberEP 99121653
Classification (CPC)C07C7/12 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedNov 2, 1999PublishedJuly 19, 2000Patent grantedAug 27, 2003Term endedNov 2, 2019

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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