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Expired European patentEurope

Polysaccharide aldehydes prepared by oxidation method and used as strength additives in papermaking

EP 1077221 B1 · Applicant: National Starch and Chemical Investment Holding Corporation

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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 August 17, 2000 and granted March 22, 2006. A European patent lasts at most 20 years from filing, so its term ended August 17, 2020.
  • 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 February 17, 2026.
  • 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.
FiledAugust 17, 2000
PublishedFebruary 21, 2001
GrantedMarch 22, 2006
Term endedAugust 17, 2020
Application numberEP 00117282
Classification (CPC)C08B11/20 +2 more

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedAug 17, 2000PublishedFeb 21, 2001Patent grantedMarch 22, 2006Term endedAug 17, 2020

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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