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Expired European patentEurope

Method for processing trihydrate alumina bauxite with a low reactive silica content

EP 0765290 B1 · Applicant: ALUMINIUM PECHINEY

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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 March 26, 1996 and granted October 28, 1998. A European patent lasts at most 20 years from filing, so its term ended March 26, 2016.
  • 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 September 26, 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.
FiledMarch 26, 1996
PublishedApril 2, 1997
GrantedOctober 28, 1998
Term endedMarch 26, 2016
Application numberEP 96909202
Classification (CPC)C01F7/47 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedMarch 26, 1996PublishedApril 2, 1997Patent grantedOct 28, 1998Term endedMarch 26, 2016

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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