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Expired European patentEurope

Process for producing low-molecular-weight allylamine polymers or addition salts thereof

EP 1024151 B1 · Applicant: NITTO BOSEKI 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 September 10, 1998 and granted July 28, 2004. A European patent lasts at most 20 years from filing, so its term ended September 10, 2018.
  • 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 March 10, 2024.
  • 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.
FiledSeptember 10, 1998
PublishedAugust 2, 2000
GrantedJuly 28, 2004
Term endedSeptember 10, 2018
Application numberEP 98941801
Classification (CPC)C09D11/30 +1 more

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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