Patent Yard Sign in
Expired European patentEurope

Plural frequency patch antenna assembly

EP 0447218 B1 · Applicant: Hughes Aircraft Company

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 13, 1991 and granted May 8, 1996. A European patent lasts at most 20 years from filing, so its term ended March 13, 2011.
  • 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 September 13, 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.
FiledMarch 13, 1991
PublishedSeptember 18, 1991
GrantedMay 8, 1996
Term endedMarch 13, 2011
Application numberEP 91302133
Classification (CPC)H01Q5/378 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedMarch 13, 1991PublishedSep 18, 1991Patent grantedMay 8, 1996Term endedMarch 13, 2011

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.