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Expired European patentEurope

Process and device for increasing the separating performance of flue gas desulfurization installations

EP 0509243 B1 · Applicant: BDAG Balcke-Dürr Aktiengesellschaft

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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 March 13, 1992 and granted October 30, 1996. A European patent lasts at most 20 years from filing, so its term ended March 13, 2012.
  • 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 September 13, 2017.
  • 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.
FiledMarch 13, 1992
PublishedOctober 21, 1992
GrantedOctober 30, 1996
Term endedMarch 13, 2012
Application numberEP 92104371
Classification (CPC)B01F25/4316 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedMarch 13, 1992PublishedOct 21, 1992Patent grantedOct 30, 1996Term endedMarch 13, 2012

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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