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Expired European patentEurope

Apparatus and method for stabilizing the frequency of a clock signal generated by an on-chip clock generator

EP 0163875 B1 · Applicant: International Business Machines Corporation

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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 April 19, 1985 and granted August 16, 1989. A European patent lasts at most 20 years from filing, so its term ended April 19, 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 October 19, 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.
FiledApril 19, 1985
PublishedDecember 11, 1985
GrantedAugust 16, 1989
Term endedApril 19, 2005
Application numberEP 85104679
Classification (CPC)G06F1/04

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedApril 19, 1985PublishedDec 11, 1985Patent grantedAug 16, 1989Term endedApril 19, 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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