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Expired European patentEurope

Method for continuous production of water absorbent resin

EP 1589040 B1 · Applicant: NIPPON SHOKUBAI 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 March 22, 2005 and granted September 10, 2008. A European patent lasts at most 20 years from filing, so its term ended March 22, 2025.
  • 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.
FiledMarch 22, 2005
PublishedOctober 26, 2005
GrantedSeptember 10, 2008
Term endedMarch 22, 2025
Application numberEP 05006193
Classification (CPC)C08F6/006

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedMarch 22, 2005PublishedOct 26, 2005Patent grantedSep 10, 2008Term endedMarch 22, 2025

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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