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Expired European patentEurope

Process for the conversion of an olefin or a mixture of olefins

EP 0664776 B1 · Applicant: DSM N.V.

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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 12, 1993 and granted July 10, 1996. A European patent lasts at most 20 years from filing, so its term ended October 12, 2013.
  • 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 12, 2019.
  • 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 12, 1993
PublishedAugust 2, 1995
GrantedJuly 10, 1996
Term endedOctober 12, 2013
Application numberEP 93924214
Classification (CPC)C07C6/04 +1 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedOct 12, 1993PublishedAug 2, 1995Patent grantedJuly 10, 1996Term endedOct 12, 2013

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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