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Expired European patentEurope

Regenerative process and system for the simultaneous removal of particulates and the oxides of sulfur and nitrogen from a gas stream

EP 0504476 B1 · Applicant: General Electric Environmental Services, 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 October 23, 1991 and granted February 19, 1997. A European patent lasts at most 20 years from filing, so its term ended October 23, 2011.
  • 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 April 23, 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.
FiledOctober 23, 1991
PublishedSeptember 23, 1992
GrantedFebruary 19, 1997
Term endedOctober 23, 2011
Application numberEP 91118046
Classification (CPC)B01D53/60

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedOct 23, 1991PublishedSep 23, 1992Patent grantedFeb 19, 1997Term endedOct 23, 2011

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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