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Expired European patentEurope

Method for reactivating a group VIII noble metal catalyst for use in the purification of crude terephthalic acid

EP 0335501 B1 · Applicant: AMOCO 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 February 27, 1989 and granted March 24, 1993. A European patent lasts at most 20 years from filing, so its term ended February 27, 2009.
  • 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 August 27, 2014.
  • 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.
FiledFebruary 27, 1989
PublishedOctober 4, 1989
GrantedMarch 24, 1993
Term endedFebruary 27, 2009
Application numberEP 89301917
Classification (CPC)C07C51/487 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedFeb 27, 1989PublishedOct 4, 1989Patent grantedMarch 24, 1993Term endedFeb 27, 2009

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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