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Expired European patentEurope

Exhaust duct for gas turbines

EP 0087643 B1 · Applicant: KRAFTWERK UNION 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 February 10, 1983 and granted September 10, 1986. A European patent lasts at most 20 years from filing, so its term ended February 10, 2003.
  • 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 10, 2008.
  • 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 10, 1983
PublishedSeptember 7, 1983
GrantedSeptember 10, 1986
Term endedFebruary 10, 2003
Application numberEP 83101296
Classification (CPC)F01D25/30 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedFeb 10, 1983PublishedSep 7, 1983Patent grantedSep 10, 1986Term endedFeb 10, 2003

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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