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Expired European patentEurope

Furnace inside state estimation control apparatus of pulverized coal combustion furnace

EP 0773408 B1 · Applicant: HITACHI, LTD.

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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 November 5, 1996 and granted October 6, 1999. A European patent lasts at most 20 years from filing, so its term ended November 5, 2016.
  • 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 May 5, 2022.
  • 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.
FiledNovember 5, 1996
PublishedMay 14, 1997
GrantedOctober 6, 1999
Term endedNovember 5, 2016
Application numberEP 96117700
Classification (CPC)F23N5/003 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedNov 5, 1996PublishedMay 14, 1997Patent grantedOct 6, 1999Term endedNov 5, 2016

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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