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Expired European patentEurope

Airborne IFF system having a radar and an interrogation antenna

EP 0018878 B1 · Applicant: THOMSON-CSF

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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 April 15, 1980 and granted February 22, 1984. A European patent lasts at most 20 years from filing, so its term ended April 15, 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 15, 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.
FiledApril 15, 1980
PublishedNovember 12, 1980
GrantedFebruary 22, 1984
Term endedApril 15, 2000
Application numberEP 80400500
Classification (CPC)H01Q19/005 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedApril 15, 1980PublishedNov 12, 1980Patent grantedFeb 22, 1984Term endedApril 15, 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.