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Expired European patentEurope

Use of amidoximated starch in paper making

EP 0200830 B1 · Applicant: KYORITSU YUKI CO. LTD.

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Overview

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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 July 25, 1985 and granted November 11, 1992. A European patent lasts at most 20 years from filing, so its term ended July 25, 2005.
  • 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 January 25, 2011.
  • 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.
FiledJuly 25, 1985
PublishedNovember 12, 1986
GrantedNovember 11, 1992
Term endedJuly 25, 2005
Application numberEP 85305323
Classification (CPC)C08B31/125 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedJuly 25, 1985PublishedNov 12, 1986Patent grantedNov 11, 1992Term endedJuly 25, 2005

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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