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Expired European patentEurope

Linear alpha olefin production using a tank growth reactor

EP 0109989 B1 · Applicant: THE DOW CHEMICAL COMPANY

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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 November 25, 1982 and granted March 26, 1986. A European patent lasts at most 20 years from filing, so its term ended November 25, 2002.
  • 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 25, 2008.
  • 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 25, 1982
PublishedJune 13, 1984
GrantedMarch 26, 1986
Term endedNovember 25, 2002
Application numberEP 82306298
Classification (CPC)C07C2/88

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedNov 25, 1982PublishedJune 13, 1984Patent grantedMarch 26, 1986Term endedNov 25, 2002

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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