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Expired European patentEurope

Non-stick coating system with ptfe and pfa or fep for concentration gradient

EP 0561981 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 December 10, 1991 and granted January 3, 1996. A European patent lasts at most 20 years from filing, so its term ended December 10, 2011.
  • 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 June 10, 2017.
  • 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.
FiledDecember 10, 1991
PublishedSeptember 29, 1993
GrantedJanuary 3, 1996
Term endedDecember 10, 2011
Application numberEP 92902082
Classification (CPC)C09D179/08 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedDec 10, 1991PublishedSep 29, 1993Patent grantedJan 3, 1996Term endedDec 10, 2011

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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