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Expired European patentEurope

Amphoteric fluorescent whitening agents

EP 1674616 B1 · Applicant: BASF SE

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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 November 11, 2003 and granted September 19, 2012. A European patent lasts at most 20 years from filing, so its term ended November 11, 2023.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledNovember 11, 2003
PublishedJune 28, 2006
GrantedSeptember 19, 2012
Term endedNovember 11, 2023
Application numberEP 06111552
Classification (CPC)D21H21/30

Timeline

Timeline From EPO dates

2004200620082010201220142016201820202022Application filedNov 11, 2003PublishedJune 28, 2006Patent grantedSep 19, 2012Term endedNov 11, 2023

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.