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Expired European patentEurope

Isopropanolamines as catalyst deactivators in solution process for polymerization of alpha-olefins

EP 0243083 B1 · Applicant: Du Pont Canada Inc.

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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 April 15, 1987 and granted July 25, 1990. A European patent lasts at most 20 years from filing, so its term ended April 15, 2007.
  • 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 October 15, 2012.
  • 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.
FiledApril 15, 1987
PublishedOctober 28, 1987
GrantedJuly 25, 1990
Term endedApril 15, 2007
Application numberEP 87303322
Classification (CPC)C08F6/02

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedApril 15, 1987PublishedOct 28, 1987Patent grantedJuly 25, 1990Term endedApril 15, 2007

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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