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Expired European patentEurope

Modified membrane suppressor and method of use

EP 0180321 B1 · Applicant: DIONEX 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 September 25, 1985 and granted February 27, 1991. A European patent lasts at most 20 years from filing, so its term ended September 25, 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 March 25, 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.
FiledSeptember 25, 1985
PublishedMay 7, 1986
GrantedFebruary 27, 1991
Term endedSeptember 25, 2005
Application numberEP 85306830
Classification (CPC)G01N30/96 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedSep 25, 1985PublishedMay 7, 1986Patent grantedFeb 27, 1991Term endedSep 25, 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

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