Expired European patentEurope
Arrangement on a fume collecting chamber for a metallurgical vessel
EP 0004004 B1 · Applicant: UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR"
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 February 23, 1979 and granted September 29, 1982. A European patent lasts at most 20 years from filing, so its term ended February 23, 1999.
- 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 August 23, 2004.
- 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.
FiledFebruary 23, 1979
PublishedSeptember 19, 1979
GrantedSeptember 29, 1982
Term endedFebruary 23, 1999
Application numberEP 79100549
Classification (CPC)C21C5/40 +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.