Expired European patentEurope
Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment
EP 0670911 B1 · Applicant: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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 September 27, 1994 and granted September 19, 2001. A European patent lasts at most 20 years from filing, so its term ended September 27, 2014.
- 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 27, 2020.
- 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 27, 1994
PublishedSeptember 13, 1995
GrantedSeptember 19, 2001
Term endedSeptember 27, 2014
Application numberEP 94927655
Classification (CPC)C22B15/003 +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.