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Expired European patentEurope

Gas turbine engine combustor

EP 0471437 B1 · Applicant: ROLLS-ROYCE plc

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Overview

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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 July 2, 1991 and granted May 18, 1994. A European patent lasts at most 20 years from filing, so its term ended July 2, 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 January 2, 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.
FiledJuly 2, 1991
PublishedFebruary 19, 1992
GrantedMay 18, 1994
Term endedJuly 2, 2011
Application numberEP 91306018
Classification (CPC)F23R3/002 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJuly 2, 1991PublishedFeb 19, 1992Patent grantedMay 18, 1994Term endedJuly 2, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.