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Expired European patentEurope

Activated carbon, production thereof and its use for adsorption

EP 0488105 B1 · Applicant: THE SOCIAL WELFARE FOUNDATION HOKKAIDO REHABILY

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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 November 25, 1991 and granted January 31, 1996. A European patent lasts at most 20 years from filing, so its term ended November 25, 2011.
  • 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 25, 2017.
  • 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 25, 1991
PublishedJune 3, 1992
GrantedJanuary 31, 1996
Term endedNovember 25, 2011
Application numberEP 91120054
Classification (CPC)F01N3/0807 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedNov 25, 1991PublishedJune 3, 1992Patent grantedJan 31, 1996Term endedNov 25, 2011

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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