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Expired European patentEurope

Amplifier arrangement

EP 0156410 B1 · Applicant: Philips Electronics N.V.

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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 February 25, 1985 and granted December 6, 1989. A European patent lasts at most 20 years from filing, so its term ended February 25, 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 August 25, 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.
FiledFebruary 25, 1985
PublishedOctober 2, 1985
GrantedDecember 6, 1989
Term endedFebruary 25, 2005
Application numberEP 85200243
Classification (CPC)H03F3/3066 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedFeb 25, 1985PublishedOct 2, 1985Patent grantedDec 6, 1989Term endedFeb 25, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.