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Expired European patentEurope

Method and apparatus for measuring fluid flow velocity, in particular in a wind tunnel

EP 0346601 B1 · Applicant: DEUTSCHE FORSCHUNGSANSTALT FÜR LUFT- UND RAUMFAHRT e.V.

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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 April 29, 1989 and granted April 14, 1993. A European patent lasts at most 20 years from filing, so its term ended April 29, 2009.
  • 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 October 29, 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.
FiledApril 29, 1989
PublishedDecember 20, 1989
GrantedApril 14, 1993
Term endedApril 29, 2009
Application numberEP 89107824
Classification (CPC)G01P5/26

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedApril 29, 1989PublishedDec 20, 1989Patent grantedApril 14, 1993Term endedApril 29, 2009

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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