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Expired European patentEurope

Multilayer circuit

EP 0191981 B1 · Applicant: MARCONI ELECTRONIC DEVICES LIMITED

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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, 1985 and granted September 20, 1989. A European patent lasts at most 20 years from filing, so its term ended November 28, 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 May 28, 2011.
  • 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, 1985
PublishedAugust 27, 1986
GrantedSeptember 20, 1989
Term endedNovember 28, 2005
Application numberEP 85308650
Classification (CPC)H10W20/425 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedNov 28, 1985PublishedAug 27, 1986Patent grantedSep 20, 1989Term endedNov 28, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.