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Expired European patentEurope

Amplitude-modulated transmitter wih anode-B modulation

EP 0159524 B1 · Applicant: BBC Brown Boveri AG

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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 March 16, 1985 and granted November 15, 1989. A European patent lasts at most 20 years from filing, so its term ended March 16, 2005.
  • 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 16, 2010.
  • 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 16, 1985
PublishedOctober 30, 1985
GrantedNovember 15, 1989
Term endedMarch 16, 2005
Application numberEP 85103048
Classification (CPC)H03C1/62

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedMarch 16, 1985PublishedOct 30, 1985Patent grantedNov 15, 1989Term endedMarch 16, 2005

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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