Expired European patentEurope
Process for passivating anodization of copper in a molten fluoride medium, and application to the protection of copper parts of fluorine electrolyzers
EP 0321536 B1 · Applicant: COMURHEX Société pour la Conversion de l'Uranium en Métal et Hexafluorure
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 June 23, 1988 and granted August 4, 1993. A European patent lasts at most 20 years from filing, so its term ended June 23, 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 December 23, 2013.
- 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.
FiledJune 23, 1988
PublishedJune 28, 1989
GrantedAugust 4, 1993
Term endedJune 23, 2008
Application numberEP 88905883
Classification (CPC)C25D11/34 +1 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.