Patent Yard Sign in
Expired European patentEurope

Optical fault seeking apparatus for material webs

EP 0020880 B1 · Applicant: Erwin Sick GmbH Optik-Elektronik

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed March 31, 1980 and granted July 11, 1984. A European patent lasts at most 20 years from filing, so its term ended March 31, 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 October 1, 2005.
  • 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.
FiledMarch 31, 1980
PublishedJanuary 7, 1981
GrantedJuly 11, 1984
Term endedMarch 31, 2000
Application numberEP 80101712
Classification (CPC)D06H3/08 +1 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedMarch 31, 1980PublishedJan 7, 1981Patent grantedJuly 11, 1984Term endedMarch 31, 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

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