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Expired European patentEurope

Heating tube for absorber and method of manufacturing same

EP 0882939 B1 · Applicant: SANYO ELECTRIC CO. LTD

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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 10, 1997 and granted July 9, 2003. A European patent lasts at most 20 years from filing, so its term ended December 10, 2017.
  • 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 10, 2023.
  • 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 10, 1997
PublishedDecember 9, 1998
GrantedJuly 9, 2003
Term endedDecember 10, 2017
Application numberEP 97947889
Classification (CPC)F28F1/42 +2 more

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedDec 10, 1997PublishedDec 9, 1998Patent grantedJuly 9, 2003Term endedDec 10, 2017

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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