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Expired European patentEurope

Method for measuring the size and velocity of spherical particles using the phase and intensity of scattered light

EP 0447529 B1 · Applicant: AEROMETRICS, INC.

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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 October 2, 1990 and granted January 15, 1997. A European patent lasts at most 20 years from filing, so its term ended October 2, 2010.
  • 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 April 2, 2016.
  • 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.
FiledOctober 2, 1990
PublishedSeptember 25, 1991
GrantedJanuary 15, 1997
Term endedOctober 2, 2010
Application numberEP 90914982
Classification (CPC)G01N15/0205

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedOct 2, 1990PublishedSep 25, 1991Patent grantedJan 15, 1997Term endedOct 2, 2010

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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