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Expired European patentEurope

Conductivity sensor for an ion exchange water softener

EP 1807356 B1 · Applicant: GENERAL ELECTRIC COMPANY

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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 20, 2005 and granted March 28, 2018. A European patent lasts at most 20 years from filing, so its term ended October 20, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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 20, 2005
PublishedJuly 18, 2007
GrantedMarch 28, 2018
Term endedOctober 20, 2025
Application numberEP 05812431
Classification (CPC)C02F1/42 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedOct 20, 2005PublishedJuly 18, 2007Patent grantedMarch 28, 2018Term endedOct 20, 2025

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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