Patent Yard Sign in
Expired European patentEurope

Phase-locked circuits

EP 0079446 B1 · Applicant: International Business Machines Corporation

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 September 22, 1982 and granted July 10, 1985. A European patent lasts at most 20 years from filing, so its term ended September 22, 2002.
  • 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 March 22, 2008.
  • 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.
FiledSeptember 22, 1982
PublishedMay 25, 1983
GrantedJuly 10, 1985
Term endedSeptember 22, 2002
Application numberEP 82108768
Classification (CPC)H03L7/099

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedSep 22, 1982PublishedMay 25, 1983Patent grantedJuly 10, 1985Term endedSep 22, 2002

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.