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Expired European patentEurope

Directional sensor for terrestrial sound

EP 0448680 B1 · Applicant: WASAGCHEMIE Sythen GmbH

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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 15, 1990 and granted August 3, 1994. A European patent lasts at most 20 years from filing, so its term ended October 15, 2010.
  • 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 15, 2016.
  • 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 15, 1990
PublishedOctober 2, 1991
GrantedAugust 3, 1994
Term endedOctober 15, 2010
Application numberEP 90915414
Classification (CPC)G01V1/16

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedOct 15, 1990PublishedOct 2, 1991Patent grantedAug 3, 1994Term endedOct 15, 2010

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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