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Expired European patentEurope

Method of measuring backscattered light, and device for same measuring

EP 0403094 B1 · Applicant: KOKUSAI DENSHIN DENWA CO., LTD

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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 24, 1990 and granted September 7, 1994. A European patent lasts at most 20 years from filing, so its term ended May 24, 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 November 24, 2015.
  • 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 24, 1990
PublishedDecember 19, 1990
GrantedSeptember 7, 1994
Term endedMay 24, 2010
Application numberEP 90305662
Classification (CPC)G01M11/3172

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMay 24, 1990PublishedDec 19, 1990Patent grantedSep 7, 1994Term endedMay 24, 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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