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Expired European patentEurope

Circuit for sensor controlled distance measurement provided with a light measuring means

EP 0025171 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 August 26, 1980 and granted December 18, 1985. A European patent lasts at most 20 years from filing, so its term ended August 26, 2000.
  • 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 February 26, 2006.
  • 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.
FiledAugust 26, 1980
PublishedMarch 18, 1981
GrantedDecember 18, 1985
Term endedAugust 26, 2000
Application numberEP 80105060
Classification (CPC)H10F39/158

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedAug 26, 1980PublishedMarch 18, 1981Patent grantedDec 18, 1985Term endedAug 26, 2000

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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