Patent Yard Sign in
Expired European patentEurope

Production of composite membranes

EP 0170232 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed July 30, 1985 and granted April 19, 1989. A European patent lasts at most 20 years from filing, so its term ended July 30, 2005.
  • 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 January 30, 2011.
  • 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.
FiledJuly 30, 1985
PublishedFebruary 5, 1986
GrantedApril 19, 1989
Term endedJuly 30, 2005
Application numberEP 85109462
Classification (CPC)B01D69/12 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedJuly 30, 1985PublishedFeb 5, 1986Patent grantedApril 19, 1989Term endedJuly 30, 2005

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.