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Expired European patentEurope

A laser-doppler-apparatus for determining the size of moving spherical particles in a fluid flow

EP 0144310 B1 · Applicant: DANTEC ELEKTRONIK, MEDICINSK OG VIDENSKABELIGT MALEUDSTYR A/S

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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 May 18, 1983 and granted August 19, 1987. A European patent lasts at most 20 years from filing, so its term ended May 18, 2003.
  • 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 November 18, 2008.
  • 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.
FiledMay 18, 1983
PublishedJune 19, 1985
GrantedAugust 19, 1987
Term endedMay 18, 2003
Application numberEP 83901590
Classification (CPC)G01N15/0205

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMay 18, 1983PublishedJune 19, 1985Patent grantedAug 19, 1987Term endedMay 18, 2003

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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