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Expired European patentEurope

Digital error corrected fractional-N synthesizer and method

EP 0557799 B1 · Applicant: Hughes Aircraft Company

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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 February 10, 1993 and granted September 16, 1998. A European patent lasts at most 20 years from filing, so its term ended February 10, 2013.
  • 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 August 10, 2018.
  • 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.
FiledFebruary 10, 1993
PublishedSeptember 1, 1993
GrantedSeptember 16, 1998
Term endedFebruary 10, 2013
Application numberEP 93102068
Classification (CPC)H03L7/1976

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedFeb 10, 1993PublishedSep 1, 1993Patent grantedSep 16, 1998Term endedFeb 10, 2013

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.