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Expired European patentEurope

Catalyst for the gas phase polymerization of ethylene containing a phosphor compound, process for preparing the same

EP 0239474 B1 · Applicant: ELF ATOCHEM S.A.

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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 March 17, 1987 and granted October 24, 1990. A European patent lasts at most 20 years from filing, so its term ended March 17, 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 September 17, 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.
FiledMarch 17, 1987
PublishedSeptember 30, 1987
GrantedOctober 24, 1990
Term endedMarch 17, 2007
Application numberEP 87400587
Classification (CPC)C08F10/00

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMarch 17, 1987PublishedSep 30, 1987Patent grantedOct 24, 1990Term endedMarch 17, 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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