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Expired European patentEurope

Production of alumina trihydrate with separate control of sodium content and size distribution

EP 1032540 B1 · Applicant: ALUMINIUM PECHINEY

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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 16, 1998 and granted August 29, 2001. A European patent lasts at most 20 years from filing, so its term ended November 16, 2018.
  • 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 16, 2024.
  • 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 16, 1998
PublishedSeptember 6, 2000
GrantedAugust 29, 2001
Term endedNovember 16, 2018
Application numberEP 98955669
Classification (CPC)C01F7/144

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedNov 16, 1998PublishedSep 6, 2000Patent grantedAug 29, 2001Term endedNov 16, 2018

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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