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Expired European patentEurope

Method of reducing the concentration of finely dispersed solids in process solutions in paper manufacturing

EP 0706499 B1 · Applicant: Henkel Kommanditgesellschaft auf Aktien

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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 22, 1994 and granted April 23, 1997. A European patent lasts at most 20 years from filing, so its term ended June 22, 2014.
  • 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 22, 2019.
  • 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 22, 1994
PublishedApril 17, 1996
GrantedApril 23, 1997
Term endedJune 22, 2014
Application numberEP 94921619
Classification (CPC)D21H17/37 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 22, 1994PublishedApril 17, 1996Patent grantedApril 23, 1997Term endedJune 22, 2014

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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