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Expired European patentEurope

Process for improving and retaining pulp properties

EP 0096460 B1 · Applicant: Pulp and Paper Research Institute of Canada

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 April 29, 1983 and granted September 3, 1986. A European patent lasts at most 20 years from filing, so its term ended April 29, 2003.
  • 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 October 29, 2008.
  • 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.
FiledApril 29, 1983
PublishedDecember 21, 1983
GrantedSeptember 3, 1986
Term endedApril 29, 2003
Application numberEP 83302424
Classification (CPC)D21C9/007

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedApril 29, 1983PublishedDec 21, 1983Patent grantedSep 3, 1986Term endedApril 29, 2003

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.