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Expired European patentEurope

Silver-containing catalyst for the preparation of ethylene oxide

EP 0002143 B1 · Applicant: P C U K PRODUITS CHIMIQUES UGINE KUHLMANN

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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 October 27, 1978 and granted January 21, 1981. A European patent lasts at most 20 years from filing, so its term ended October 27, 1998.
  • 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 April 27, 2004.
  • 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.
FiledOctober 27, 1978
PublishedMay 30, 1979
GrantedJanuary 21, 1981
Term endedOctober 27, 1998
Application numberEP 78400153
Classification (CPC)C07D301/10 +1 more

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedOct 27, 1978PublishedMay 30, 1979Patent grantedJan 21, 1981Term endedOct 27, 1998

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.