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Expired European patentEurope

Blocking ratio enhancing agent for permeable membrane, method of blocking ratio enhancement, permeable membrane and method of water treatment

EP 1808221 B1 · Applicant: Kurita Water Industries 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 October 17, 2005 and granted March 30, 2011. A European patent lasts at most 20 years from filing, so its term ended October 17, 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.
FiledOctober 17, 2005
PublishedJuly 18, 2007
GrantedMarch 30, 2011
Term endedOctober 17, 2025
Application numberEP 05795782
Classification (CPC)B01D69/02 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedOct 17, 2005PublishedJuly 18, 2007Patent grantedMarch 30, 2011Term endedOct 17, 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

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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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