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Expired European patentEurope

Catalyst for producing atactic polypropylene, and procedure for preparing such catalyst

EP 0394237 B1 · Applicant: NESTE OY

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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 May 23, 1988 and granted April 14, 1993. A European patent lasts at most 20 years from filing, so its term ended May 23, 2008.
  • 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 November 23, 2013.
  • 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.
FiledMay 23, 1988
PublishedOctober 31, 1990
GrantedApril 14, 1993
Term endedMay 23, 2008
Application numberEP 88904539
Classification (CPC)C08F110/06

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedMay 23, 1988PublishedOct 31, 1990Patent grantedApril 14, 1993Term endedMay 23, 2008

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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