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Trihydrocarbyl aluminium cocatalysts for olefin polymerization, and use thereof

EP 0005326 A1 · Applicant: EXXON RESEARCH AND ENGINEERING COMPANY

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 12, 1979 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 12, 1999.
  • 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 12, 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.
FiledApril 12, 1979
PublishedNovember 14, 1979
GrantedNever granted
Term endedApril 12, 1999
Application numberEP 79300613
Classification (CPC)C08F10/00 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedApril 12, 1979PublishedNov 14, 1979Term endedApril 12, 1999

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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