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Expired European patentEurope

Catalysts and process for the selective hydrogenation of acetylenes

EP 0183293 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

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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 30, 1985 and granted May 24, 1989. A European patent lasts at most 20 years from filing, so its term ended October 30, 2005.
  • 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 30, 2011.
  • 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 30, 1985
PublishedJune 4, 1986
GrantedMay 24, 1989
Term endedOctober 30, 2005
Application numberEP 85201764
Classification (CPC)C07C7/167 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedOct 30, 1985PublishedJune 4, 1986Patent grantedMay 24, 1989Term endedOct 30, 2005

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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