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Expired European patentEurope

Production of polysuccinimide

EP 0759948 B1 · Applicant: DONLAR CORPORATION

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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 May 16, 1995 and granted November 24, 1999. A European patent lasts at most 20 years from filing, so its term ended May 16, 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 16, 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 16, 1995
PublishedMarch 5, 1997
GrantedNovember 24, 1999
Term endedMay 16, 2015
Application numberEP 95919179
Classification (CPC)C08G73/1092

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedMay 16, 1995PublishedMarch 5, 1997Patent grantedNov 24, 1999Term endedMay 16, 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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