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Expired European patentEurope

Method and apparatus for treating fiber suspension

EP 0509561 B1 · Applicant: A.AHLSTROM CORPORATION

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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 June 26, 1990 and granted May 15, 1996. A European patent lasts at most 20 years from filing, so its term ended June 26, 2010.
  • 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 December 26, 2015.
  • 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.
FiledJune 26, 1990
PublishedOctober 21, 1992
GrantedMay 15, 1996
Term endedJune 26, 2010
Application numberEP 92111720
Classification (CPC)B01D36/001 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedJune 26, 1990PublishedOct 21, 1992Patent grantedMay 15, 1996Term endedJune 26, 2010

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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