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Expired European patentEurope

Sizing agent composition and method of using the same

EP 0151646 B1 · Applicant: NIPPON OIL 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 23, 1984 and granted October 7, 1987. A European patent lasts at most 20 years from filing, so its term ended July 23, 2004.
  • 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 23, 2010.
  • 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 23, 1984
PublishedAugust 21, 1985
GrantedOctober 7, 1987
Term endedJuly 23, 2004
Application numberEP 84902826
Classification (CPC)D21H17/10 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedJuly 23, 1984PublishedAug 21, 1985Patent grantedOct 7, 1987Term endedJuly 23, 2004

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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