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Expired European patentEurope

Method for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer

EP 0051358 B1 · Applicant: UNION CARBIDE CORPORATION

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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 September 18, 1981 and granted July 25, 1984. A European patent lasts at most 20 years from filing, so its term ended September 18, 2001.
  • 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 March 18, 2007.
  • 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.
FiledSeptember 18, 1981
PublishedMay 12, 1982
GrantedJuly 25, 1984
Term endedSeptember 18, 2001
Application numberEP 81304308
Classification (CPC)B29C48/022 +2 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedSep 18, 1981PublishedMay 12, 1982Patent grantedJuly 25, 1984Term endedSep 18, 2001

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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