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Expired European patentEurope

Cerium oxide slurry for polishing, process for preparing the slurry, and process for polishing with the slurry

EP 1056816 B1 · Applicant: Showa Denko Kabushiki Kaisha

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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 December 21, 1999 and granted February 9, 2005. A European patent lasts at most 20 years from filing, so its term ended December 21, 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 June 21, 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.
FiledDecember 21, 1999
PublishedDecember 6, 2000
GrantedFebruary 9, 2005
Term endedDecember 21, 2019
Application numberEP 99959933
Classification (CPC)C09G1/02 +1 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedDec 21, 1999PublishedDec 6, 2000Patent grantedFeb 9, 2005Term endedDec 21, 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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