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Expired European patentEurope

Antenna system for transmitting circularly or linearly polarized microwaves

EP 0023933 B1 · Applicant: Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung

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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 August 13, 1979 and granted June 13, 1984. A European patent lasts at most 20 years from filing, so its term ended August 13, 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 February 13, 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.
FiledAugust 13, 1979
PublishedFebruary 18, 1981
GrantedJune 13, 1984
Term endedAugust 13, 1999
Application numberEP 79102937
Classification (CPC)H01Q13/0225

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedAug 13, 1979PublishedFeb 18, 1981Patent grantedJune 13, 1984Term endedAug 13, 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

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