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Expired European patentEurope

Method for the removal of sulphur oxides from a flue gas with a baghouse as a secondary reactor

EP 0204710 B1 · Applicant: RESEARCH COTTRELL, INC.

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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 September 30, 1985 and granted January 13, 1993. A European patent lasts at most 20 years from filing, so its term ended September 30, 2005.
  • 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 30, 2011.
  • 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 30, 1985
PublishedDecember 17, 1986
GrantedJanuary 13, 1993
Term endedSeptember 30, 2005
Application numberEP 85904774
Classification (CPC)B01D53/501

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedSep 30, 1985PublishedDec 17, 1986Patent grantedJan 13, 1993Term endedSep 30, 2005

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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