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Expired European patentEurope

Electric arc and radio frequency spectrum detection

EP 0507782 B1 · Applicant: HENDRY MECHANICAL WORKS

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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 October 24, 1990 and granted January 17, 1996. A European patent lasts at most 20 years from filing, so its term ended October 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 April 24, 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.
FiledOctober 24, 1990
PublishedOctober 14, 1992
GrantedJanuary 17, 1996
Term endedOctober 24, 2010
Application numberEP 90917578
Classification (CPC)G01R29/26 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedOct 24, 1990PublishedOct 14, 1992Patent grantedJan 17, 1996Term endedOct 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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