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Expired European patentEurope

Regulating method for refrigerant flow to the evaporator of a cooling plant or a heat pump

EP 0229942 B1 · Applicant: Otto Egelhof GmbH & Co.

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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 November 29, 1986 and granted June 26, 1991. A European patent lasts at most 20 years from filing, so its term ended November 29, 2006.
  • 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 May 29, 2012.
  • 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.
FiledNovember 29, 1986
PublishedJuly 29, 1987
GrantedJune 26, 1991
Term endedNovember 29, 2006
Application numberEP 86116645
Classification (CPC)G05D16/2086 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedNov 29, 1986PublishedJuly 29, 1987Patent grantedJune 26, 1991Term endedNov 29, 2006

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.