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Expired European patentEurope

Microwave phase shifter with omicron or pi phase shift

EP 0367657 B1 · Applicant: THOMSON-CSF

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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 October 24, 1989 and granted December 29, 1993. A European patent lasts at most 20 years from filing, so its term ended October 24, 2009.
  • 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 April 24, 2015.
  • 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.
FiledOctober 24, 1989
PublishedMay 9, 1990
GrantedDecember 29, 1993
Term endedOctober 24, 2009
Application numberEP 89402923
Classification (CPC)H03C7/025

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedOct 24, 1989PublishedMay 9, 1990Patent grantedDec 29, 1993Term endedOct 24, 2009

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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