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Expired European patentEurope

Annular type gas turbine combustor

EP 0831275 B1 · Applicant: Mitsubishi Heavy Industries, 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 August 29, 1997 and granted August 13, 2003. A European patent lasts at most 20 years from filing, so its term ended August 29, 2017.
  • 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 1, 2023.
  • 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.
FiledAugust 29, 1997
PublishedMarch 25, 1998
GrantedAugust 13, 2003
Term endedAugust 29, 2017
Application numberEP 97115032
Classification (CPC)F23R3/26

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedAug 29, 1997PublishedMarch 25, 1998Patent grantedAug 13, 2003Term endedAug 29, 2017

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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