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Expired European patentEurope

Radar system with a multiplicity of antenna beams for elevation coverage

EP 0020712 B1 · Applicant: SPERRY CORPORATION

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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 November 28, 1979 and granted July 27, 1983. A European patent lasts at most 20 years from filing, so its term ended November 28, 1999.
  • 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 May 28, 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.
FiledNovember 28, 1979
PublishedJanuary 7, 1981
GrantedJuly 27, 1983
Term endedNovember 28, 1999
Application numberEP 80900109
Classification (CPC)G01S7/20 +2 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedNov 28, 1979PublishedJan 7, 1981Patent grantedJuly 27, 1983Term endedNov 28, 1999

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.