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Expired European patentEurope

Cyclone separator including a hopper formed by water-steam cooled walls

EP 0457983 B1 · Applicant: FOSTER WHEELER ENERGY CORPORATION

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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 May 25, 1990 and granted December 11, 1996. A European patent lasts at most 20 years from filing, so its term ended May 25, 2010.
  • 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 November 25, 2015.
  • 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.
FiledMay 25, 1990
PublishedNovember 27, 1991
GrantedDecember 11, 1996
Term endedMay 25, 2010
Application numberEP 90305722
Classification (CPC)B04C5/08 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMay 25, 1990PublishedNov 27, 1991Patent grantedDec 11, 1996Term endedMay 25, 2010

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.