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Expired European patentEurope

Method for the regulation of the feed water flow in a steam plant

EP 0308596 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 July 11, 1988 and granted December 11, 1991. A European patent lasts at most 20 years from filing, so its term ended July 11, 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 January 11, 2014.
  • 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.
FiledJuly 11, 1988
PublishedMarch 29, 1989
GrantedDecember 11, 1991
Term endedJuly 11, 2008
Application numberEP 88111049
Classification (CPC)F22B35/101

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJuly 11, 1988PublishedMarch 29, 1989Patent grantedDec 11, 1991Term endedJuly 11, 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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