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Expired European patentEurope

Polyimide film with tin or tin salt incorporation resulting in improved adhesion

EP 0476575 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 September 17, 1991 and granted December 11, 1996. A European patent lasts at most 20 years from filing, so its term ended September 17, 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 March 17, 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.
FiledSeptember 17, 1991
PublishedMarch 25, 1992
GrantedDecember 11, 1996
Term endedSeptember 17, 2011
Application numberEP 91115717
Classification (CPC)C08K3/16 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedSep 17, 1991PublishedMarch 25, 1992Patent grantedDec 11, 1996Term endedSep 17, 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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