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Expired European patentEurope

Process for heating thin surface layers

EP 0028366 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 October 23, 1980 and granted September 12, 1984. A European patent lasts at most 20 years from filing, so its term ended October 23, 2000.
  • 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 April 23, 2006.
  • 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 23, 1980
PublishedMay 13, 1981
GrantedSeptember 12, 1984
Term endedOctober 23, 2000
Application numberEP 80106469
Classification (CPC)H05K3/0079 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedOct 23, 1980PublishedMay 13, 1981Patent grantedSep 12, 1984Term endedOct 23, 2000

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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