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Expired European patentEurope

Heat transfer element assembly

EP 0347423 B1 · Applicant: ABB AIR PREHEATER, INC.

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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 22, 1988 and granted March 18, 1992. A European patent lasts at most 20 years from filing, so its term ended February 22, 2008.
  • 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 22, 2013.
  • 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 22, 1988
PublishedDecember 27, 1989
GrantedMarch 18, 1992
Term endedFebruary 22, 2008
Application numberEP 88902733
Classification (CPC)F28D19/044

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedFeb 22, 1988PublishedDec 27, 1989Patent grantedMarch 18, 1992Term endedFeb 22, 2008

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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