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Expired European patentEurope

Optical device

EP 0579846 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 July 18, 1992 and granted August 23, 1995. A European patent lasts at most 20 years from filing, so its term ended July 18, 2012.
  • 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 January 18, 2018.
  • 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.
FiledJuly 18, 1992
PublishedJanuary 26, 1994
GrantedAugust 23, 1995
Term endedJuly 18, 2012
Application numberEP 92112302
Classification (CPC)G01D5/38

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedJuly 18, 1992PublishedJan 26, 1994Patent grantedAug 23, 1995Term endedJuly 18, 2012

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.