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Expired European patentEurope

Interpolative encoder for subscriber line audio processing circuit apparatus

EP 0054033 B1 · Applicant: ADVANCED MICRO DEVICES, INC.

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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 June 18, 1980 and granted August 21, 1985. A European patent lasts at most 20 years from filing, so its term ended June 18, 2000.
  • 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 December 18, 2005.
  • 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.
FiledJune 18, 1980
PublishedJune 23, 1982
GrantedAugust 21, 1985
Term endedJune 18, 2000
Application numberEP 81900872
Classification (CPC)H03M1/34 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedJune 18, 1980PublishedJune 23, 1982Patent grantedAug 21, 1985Term endedJune 18, 2000

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.