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Expired European patentEurope

Method for producing fly ash granules

EP 0720971 B1 · Applicant: MITSUBISHI CHEMICAL CORPORATION

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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 January 2, 1996 and granted September 1, 1999. A European patent lasts at most 20 years from filing, so its term ended January 2, 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 July 2, 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.
FiledJanuary 2, 1996
PublishedJuly 10, 1996
GrantedSeptember 1, 1999
Term endedJanuary 2, 2016
Application numberEP 96100012
Classification (CPC)C04B18/022

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedJan 2, 1996PublishedJuly 10, 1996Patent grantedSep 1, 1999Term endedJan 2, 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

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