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Expired European patentEurope

Thermo-acoustic device

EP 0191179 B1 · Applicant: GEBRÜDER SULZER AKTIENGESELLSCHAFT

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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 December 11, 1985 and granted April 26, 1989. A European patent lasts at most 20 years from filing, so its term ended December 11, 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 June 11, 2011.
  • 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.
FiledDecember 11, 1985
PublishedAugust 20, 1986
GrantedApril 26, 1989
Term endedDecember 11, 2005
Application numberEP 85115760
Classification (CPC)F25B9/14 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedDec 11, 1985PublishedAug 20, 1986Patent grantedApril 26, 1989Term endedDec 11, 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.