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Expired European patentEurope

Cation exchanger

EP 0330187 B1 · Applicant: ASAHI GLASS COMPANY 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 February 22, 1989 and granted February 15, 1995. A European patent lasts at most 20 years from filing, so its term ended February 22, 2009.
  • 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 August 22, 2014.
  • 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.
FiledFebruary 22, 1989
PublishedAugust 30, 1989
GrantedFebruary 15, 1995
Term endedFebruary 22, 2009
Application numberEP 89103108
Classification (CPC)C08G75/02 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedFeb 22, 1989PublishedAug 30, 1989Patent grantedFeb 15, 1995Term endedFeb 22, 2009

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.