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Expired European patentEurope

Defoaming agent for the paper industry based on oil in water emulsions

EP 0662172 B1 · Applicant: BASF Aktiengesellschaft

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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 September 18, 1993 and granted March 20, 1996. A European patent lasts at most 20 years from filing, so its term ended September 18, 2013.
  • 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 March 18, 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.
FiledSeptember 18, 1993
PublishedJuly 12, 1995
GrantedMarch 20, 1996
Term endedSeptember 18, 2013
Application numberEP 93920764
Classification (CPC)D21H21/12 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedSep 18, 1993PublishedJuly 12, 1995Patent grantedMarch 20, 1996Term endedSep 18, 2013

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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