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Expired European patentEurope

Seal structure of solid feeding screw, and method of manufacturing reduced metal using the seal structure

EP 1591739 B1 · Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO

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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 25, 2003 and granted July 23, 2008. A European patent lasts at most 20 years from filing, so its term ended December 25, 2023.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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 25, 2003
PublishedNovember 2, 2005
GrantedJuly 23, 2008
Term endedDecember 25, 2023
Application numberEP 03768217
Classification (CPC)F27D3/08 +2 more

Timeline

Timeline From EPO dates

2004200620082010201220142016201820202022Application filedDec 25, 2003PublishedNov 2, 2005Patent grantedJuly 23, 2008Term endedDec 25, 2023

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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