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Expired European patentEurope

Semipermeable membranes based on specified tetrabromobisphenol type polyesters

EP 0376234 B1 · Applicant: PRAXAIR TECHNOLOGY, INC.

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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 December 26, 1989 and granted February 14, 1996. A European patent lasts at most 20 years from filing, so its term ended December 26, 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 June 26, 2015.
  • 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.
FiledDecember 26, 1989
PublishedJuly 4, 1990
GrantedFebruary 14, 1996
Term endedDecember 26, 2009
Application numberEP 89123915
Classification (CPC)C08G63/6826 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedDec 26, 1989PublishedJuly 4, 1990Patent grantedFeb 14, 1996Term endedDec 26, 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

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