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Expired European patentEurope

Process for preparing metallic oxides

EP 0332686 B1 · Applicant: Etablissement Public dit: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)

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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 September 27, 1988 and granted April 28, 1993. A European patent lasts at most 20 years from filing, so its term ended September 27, 2008.
  • 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 March 27, 2014.
  • 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.
FiledSeptember 27, 1988
PublishedSeptember 20, 1989
GrantedApril 28, 1993
Term endedSeptember 27, 2008
Application numberEP 88908256
Classification (CPC)C01F17/30 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedSep 27, 1988PublishedSep 20, 1989Patent grantedApril 28, 1993Term endedSep 27, 2008

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.