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Expired European patentEurope

Process for improving the dyeability of nylon carpet fiber

EP 0159635 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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Overview

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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, 1985 and granted September 5, 1990. A European patent lasts at most 20 years from filing, so its term ended April 12, 2005.
  • 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, 2010.
  • 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, 1985
PublishedOctober 30, 1985
GrantedSeptember 5, 1990
Term endedApril 12, 2005
Application numberEP 85104463
Classification (CPC)D02J13/00 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedApril 12, 1985PublishedOct 30, 1985Patent grantedSep 5, 1990Term endedApril 12, 2005

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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