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Expired European patentEurope

Reducing the coloration of aromatic diamines

EP 1070044 B1 · Applicant: ALBEMARLE CORPORATION

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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 March 10, 1999 and granted September 15, 2004. A European patent lasts at most 20 years from filing, so its term ended March 10, 2019.
  • 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 September 10, 2024.
  • 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.
FiledMarch 10, 1999
PublishedJanuary 24, 2001
GrantedSeptember 15, 2004
Term endedMarch 10, 2019
Application numberEP 99910984
Classification (CPC)C07C209/90

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedMarch 10, 1999PublishedJan 24, 2001Patent grantedSep 15, 2004Term endedMarch 10, 2019

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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