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Expired European patentEurope

Method for measuring the solid material concentration and the grain size distribution in a suspension by using ultrasounds

EP 0199774 B1 · Applicant: LÖFFLER, Friedrich

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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 23, 1985 and granted July 12, 1989. A European patent lasts at most 20 years from filing, so its term ended October 23, 2005.
  • 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 23, 2011.
  • 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 23, 1985
PublishedNovember 5, 1986
GrantedJuly 12, 1989
Term endedOctober 23, 2005
Application numberEP 85905406
Classification (CPC)G01N15/02 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedOct 23, 1985PublishedNov 5, 1986Patent grantedJuly 12, 1989Term endedOct 23, 2005

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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