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Expired European patentEurope

Installation of a heating surface of a steam generator in a waste gas channel

EP 0469306 B1 · Applicant: WAAGNER-BIRO 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 June 29, 1991 and granted August 31, 1994. A European patent lasts at most 20 years from filing, so its term ended June 29, 2011.
  • 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 December 29, 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.
FiledJune 29, 1991
PublishedFebruary 5, 1992
GrantedAugust 31, 1994
Term endedJune 29, 2011
Application numberEP 91110811
Classification (CPC)F22B37/001

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJune 29, 1991PublishedFeb 5, 1992Patent grantedAug 31, 1994Term endedJune 29, 2011

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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