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Expired European patentEurope

A process for producing [s,s]-ethylenediamine-n,n'-disuccinic acid

EP 0770056 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 May 23, 1995 and granted January 3, 2001. A European patent lasts at most 20 years from filing, so its term ended May 23, 2015.
  • 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 November 23, 2020.
  • 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.
FiledMay 23, 1995
PublishedMay 2, 1997
GrantedJanuary 3, 2001
Term endedMay 23, 2015
Application numberEP 95919241
Classification (CPC)C07C227/18

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedMay 23, 1995PublishedMay 2, 1997Patent grantedJan 3, 2001Term endedMay 23, 2015

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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