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Expired European patentEurope

Multi-layer dielectric substrate

EP 0006444 B1 · Applicant: International Business Machines Corporation

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 May 22, 1979 and granted December 22, 1982. A European patent lasts at most 20 years from filing, so its term ended May 22, 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 November 22, 2004.
  • 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.
FiledMay 22, 1979
PublishedJanuary 9, 1980
GrantedDecember 22, 1982
Term endedMay 22, 1999
Application numberEP 79101564
Classification (CPC)H10W70/611 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedMay 22, 1979PublishedJan 9, 1980Patent grantedDec 22, 1982Term endedMay 22, 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.