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Expired European patentEurope

Process for the extraction of the salts contained in the neutralized separated product obtained in the preparation of phenol by the oxidation of cumene

EP 0952136 B1 · Applicant: Polimeri Europa S.p.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 April 6, 1999 and granted October 22, 2003. A European patent lasts at most 20 years from filing, so its term ended April 6, 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 October 6, 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.
FiledApril 6, 1999
PublishedOctober 27, 1999
GrantedOctober 22, 2003
Term endedApril 6, 2019
Application numberEP 99106812
Classification (CPC)C07C37/685 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedApril 6, 1999PublishedOct 27, 1999Patent grantedOct 22, 2003Term endedApril 6, 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

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