Expired European patentEurope
Electrodes activated by heteropolyacids, their preparation and application, in particular as cathodes for the electrolysis of water in an acidic medium
EP 0188929 B1 · Applicant: Etablissement Public dit: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
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.
Why it's free to use
- Filed November 28, 1985 and granted January 17, 1990. A European patent lasts at most 20 years from filing, so its term ended November 28, 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 May 28, 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.
FiledNovember 28, 1985
PublishedJuly 30, 1986
GrantedJanuary 17, 1990
Term endedNovember 28, 2005
Application numberEP 85402340
Classification (CPC)C25B11/00 +2 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.