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Expired European patentEurope

A method of fluid flow visualisation

EP 0314272 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 22, 1988 and granted December 27, 1990. A European patent lasts at most 20 years from filing, so its term ended July 22, 2008.
  • 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 22, 2014.
  • 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 22, 1988
PublishedMay 3, 1989
GrantedDecember 27, 1990
Term endedJuly 22, 2008
Application numberEP 88306754
Classification (CPC)G01M9/067

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJuly 22, 1988PublishedMay 3, 1989Patent grantedDec 27, 1990Term endedJuly 22, 2008

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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