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Expired European patentEurope

Integrated optical sensor arrangement

EP 0451475 B1 · Applicant: Dr. Johannes Heidenhain GmbH

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Overview

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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 February 26, 1991 and granted August 25, 1993. A European patent lasts at most 20 years from filing, so its term ended February 26, 2011.
  • 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 August 26, 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.
FiledFebruary 26, 1991
PublishedOctober 16, 1991
GrantedAugust 25, 1993
Term endedFebruary 26, 2011
Application numberEP 91102771
Classification (CPC)G02B6/34 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedFeb 26, 1991PublishedOct 16, 1991Patent grantedAug 25, 1993Term endedFeb 26, 2011

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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