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Expired European patentEurope

Water-absorbent resin composition and its production process

EP 1594557 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 February 6, 2004 and granted May 1, 2019. A European patent lasts at most 20 years from filing, so its term ended February 6, 2024.
  • 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.
FiledFebruary 6, 2004
PublishedNovember 16, 2005
GrantedMay 1, 2019
Term endedFebruary 6, 2024
Application numberEP 04708891
Classification (CPC)A61L15/60

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedFeb 6, 2004PublishedNov 16, 2005Patent grantedMay 1, 2019Term endedFeb 6, 2024

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

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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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