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Expired European patentEurope

Process for preparing a highly selective fluorinated anion exchange membrane

EP 0229451 B1 · Applicant: TOSOH 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 October 14, 1986 and granted December 27, 1990. A European patent lasts at most 20 years from filing, so its term ended October 14, 2006.
  • 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 April 14, 2012.
  • 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.
FiledOctober 14, 1986
PublishedJuly 22, 1987
GrantedDecember 27, 1990
Term endedOctober 14, 2006
Application numberEP 86307923
Classification (CPC)C08J5/2237

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedOct 14, 1986PublishedJuly 22, 1987Patent grantedDec 27, 1990Term endedOct 14, 2006

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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