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Expired European patentEurope

Process and installation for the treatment of a flow of gas containing pyrophoric dust

EP 0336087 B1 · Applicant: ACEC-Union Minière, société anonyme dite :

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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.

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Why it's free to use

  • Filed February 20, 1989 and granted January 22, 1992. A European patent lasts at most 20 years from filing, so its term ended February 20, 2009.
  • 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 20, 2014.
  • 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 20, 1989
PublishedOctober 11, 1989
GrantedJanuary 22, 1992
Term endedFebruary 20, 2009
Application numberEP 89102865
Classification (CPC)C21B7/002 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedFeb 20, 1989PublishedOct 11, 1989Patent grantedJan 22, 1992Term endedFeb 20, 2009

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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