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Expired European patentEurope

Method of activation of clay and activated clay

EP 0718237 B1 · Applicant: Hojun Kogyo Co., Ltd.

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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 August 16, 1995 and granted May 31, 2000. A European patent lasts at most 20 years from filing, so its term ended August 16, 2015.
  • 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 February 16, 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.
FiledAugust 16, 1995
PublishedJune 26, 1996
GrantedMay 31, 2000
Term endedAugust 16, 2015
Application numberEP 95112890
Classification (CPC)C01B33/40 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedAug 16, 1995PublishedJune 26, 1996Patent grantedMay 31, 2000Term endedAug 16, 2015

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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