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Expired European patentEurope

Purification of hydrogen peroxide

EP 0484371 B1 · Applicant: Interox Chemicals Limited

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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 18, 1990 and granted March 15, 1995. A European patent lasts at most 20 years from filing, so its term ended July 18, 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 January 18, 2016.
  • 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 18, 1990
PublishedMay 13, 1992
GrantedMarch 15, 1995
Term endedJuly 18, 2010
Application numberEP 90910858
Classification (CPC)B01D61/00 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedJuly 18, 1990PublishedMay 13, 1992Patent grantedMarch 15, 1995Term endedJuly 18, 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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