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Expired European patentEurope

Continuous process for the preparation of aqueous solutions of alkaline salts of arylcetic acids

EP 0885872 B1 · Applicant: ELF ATOCHEM S.A.

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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 26, 1998 and granted November 21, 2001. A European patent lasts at most 20 years from filing, so its term ended May 26, 2018.
  • 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 26, 2023.
  • 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 26, 1998
PublishedDecember 23, 1998
GrantedNovember 21, 2001
Term endedMay 26, 2018
Application numberEP 98401244
Classification (CPC)C07C51/08 +2 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedMay 26, 1998PublishedDec 23, 1998Patent grantedNov 21, 2001Term endedMay 26, 2018

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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