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Expired European patentEurope

Process and apparatus for heating the air, especially for dwellings

EP 0148988 B1 · Applicant: Vereinigte Elektrizitätswerke Westfalen AG

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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 August 2, 1984 and granted January 20, 1988. A European patent lasts at most 20 years from filing, so its term ended August 2, 2004.
  • 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 February 2, 2010.
  • 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.
FiledAugust 2, 1984
PublishedJuly 24, 1985
GrantedJanuary 20, 1988
Term endedAugust 2, 2004
Application numberEP 84109147
Classification (CPC)F24D11/00 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedAug 2, 1984PublishedJuly 24, 1985Patent grantedJan 20, 1988Term endedAug 2, 2004

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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