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Expired European patentEurope

Method for reducing oligomeric cyclic ether content of a copolymerizate

EP 0006107 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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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 16, 1979 and granted November 23, 1983. A European patent lasts at most 20 years from filing, so its term ended March 16, 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 September 16, 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.
FiledMarch 16, 1979
PublishedJanuary 9, 1980
GrantedNovember 23, 1983
Term endedMarch 16, 1999
Application numberEP 79100810
Classification (CPC)C08G65/30 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedMarch 16, 1979PublishedJan 9, 1980Patent grantedNov 23, 1983Term endedMarch 16, 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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