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Expired European patentEurope

Improved wet spinning process for aramid polymer containing salts

EP 1678355 B1 · Applicant: E.I. DUPONT 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 October 28, 2004 and granted June 4, 2008. A European patent lasts at most 20 years from filing, so its term ended October 28, 2024.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledOctober 28, 2004
PublishedJuly 12, 2006
GrantedJune 4, 2008
Term endedOctober 28, 2024
Application numberEP 04796826
Classification (CPC)D01F6/605

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedOct 28, 2004PublishedJuly 12, 2006Patent grantedJune 4, 2008Term endedOct 28, 2024

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

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