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Expired European patentEurope

Electrochemical measuring cell with acid electrolyte

EP 0305961 B1 · Applicant: Drägerwerk Aktiengesellschaft

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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 August 30, 1988 and granted June 5, 1991. A European patent lasts at most 20 years from filing, so its term ended August 30, 2008.
  • 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 2, 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.
FiledAugust 30, 1988
PublishedMarch 8, 1989
GrantedJune 5, 1991
Term endedAugust 30, 2008
Application numberEP 88114096
Classification (CPC)G01N27/404

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedAug 30, 1988PublishedMarch 8, 1989Patent grantedJune 5, 1991Term endedAug 30, 2008

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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