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Expired European patentEurope

Electroacoustic unit for generating high sonic and ultrasonic intensities in gases and interphases

EP 0450030 B1 · Applicant: CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS

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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 3, 1990 and granted July 27, 1994. A European patent lasts at most 20 years from filing, so its term ended October 3, 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 3, 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 3, 1990
PublishedOctober 9, 1991
GrantedJuly 27, 1994
Term endedOctober 3, 2010
Application numberEP 90915472
Classification (CPC)B06B3/04 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedOct 3, 1990PublishedOct 9, 1991Patent grantedJuly 27, 1994Term endedOct 3, 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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