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Expired European patentEurope

Compositions for conductive resistor phases and methods for their preparation including a method for doping tin oxide

EP 0095775 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 May 31, 1983 and granted April 16, 1986. A European patent lasts at most 20 years from filing, so its term ended May 31, 2003.
  • 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 December 1, 2008.
  • 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.
FiledMay 31, 1983
PublishedDecember 7, 1983
GrantedApril 16, 1986
Term endedMay 31, 2003
Application numberEP 83105384
Classification (CPC)H01C17/06533

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMay 31, 1983PublishedDec 7, 1983Patent grantedApril 16, 1986Term endedMay 31, 2003

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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