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Expired European patentEurope

Process for the preparation of a mixed catalyst and its use for the polymerization of alpha-olefins

EP 0002221 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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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 18, 1978 and granted May 19, 1982. A European patent lasts at most 20 years from filing, so its term ended November 18, 1998.
  • 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 18, 2004.
  • 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 18, 1978
PublishedJune 13, 1979
GrantedMay 19, 1982
Term endedNovember 18, 1998
Application numberEP 78101403
Classification (CPC)C08F10/00

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedNov 18, 1978PublishedJune 13, 1979Patent grantedMay 19, 1982Term endedNov 18, 1998

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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