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Expired European patentEurope

A method of heating a sauna and a sauna stove

EP 0290439 B1 · Applicant: YLI-KOVERO, Risto Tapio

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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 December 1, 1986 and granted September 4, 1991. A European patent lasts at most 20 years from filing, so its term ended December 1, 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 June 1, 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.
FiledDecember 1, 1986
PublishedNovember 17, 1988
GrantedSeptember 4, 1991
Term endedDecember 1, 2006
Application numberEP 87900147
Classification (CPC)A61H33/063

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedDec 1, 1986PublishedNov 17, 1988Patent grantedSep 4, 1991Term endedDec 1, 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

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