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Expired European patentEurope

Recovery of organic acids, catalysts and water from terephthalic acid manufacture

EP 0164402 B1 · Applicant: ECOLOCHEM, INC.

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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 November 27, 1984 and granted April 14, 1993. A European patent lasts at most 20 years from filing, so its term ended November 27, 2004.
  • 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 May 27, 2010.
  • 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.
FiledNovember 27, 1984
PublishedDecember 18, 1985
GrantedApril 14, 1993
Term endedNovember 27, 2004
Application numberEP 85900351
Classification (CPC)B01J49/07 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedNov 27, 1984PublishedDec 18, 1985Patent grantedApril 14, 1993Term endedNov 27, 2004

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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